./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr4.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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/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 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:27:39,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:27:39,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:27:39,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:27:39,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:27:39,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:27:39,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:27:39,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:27:39,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:27:39,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:27:39,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:27:39,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:27:39,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:27:39,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:27:39,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:27:39,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:27:39,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:27:39,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:27:39,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:27:39,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:27:39,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:27:39,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:27:39,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:27:39,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:27:39,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:27:39,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:27:39,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:27:39,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:27:39,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:27:39,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:27:39,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:27:39,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:27:39,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:27:39,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:27:39,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:27:39,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:27:39,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:27:39,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:27:39,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:27:39,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:27:39,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:27:39,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:27:39,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:27:39,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:27:39,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:27:39,355 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:27:39,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:27:39,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:27:39,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:27:39,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:27:39,357 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:27:39,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:27:39,357 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:27:39,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:27:39,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:27:39,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:27:39,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:27:39,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:27:39,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:27:39,359 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:27:39,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:27:39,359 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:27:39,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:27:39,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:27:39,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:27:39,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:27:39,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:27:39,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:27:39,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:27:39,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:27:39,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:27:39,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:27:39,361 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:27:39,361 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:27:39,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:27:39,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:27:39,362 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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f [2021-12-06 18:27:39,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:27:39,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:27:39,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:27:39,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:27:39,624 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:27:39,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/pr4.c [2021-12-06 18:27:39,666 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data/ca34744f9/0c725fcf48244ab792c8dbcb4539ba19/FLAGca3f174ab [2021-12-06 18:27:40,029 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:27:40,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/sv-benchmarks/c/array-tiling/pr4.c [2021-12-06 18:27:40,034 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data/ca34744f9/0c725fcf48244ab792c8dbcb4539ba19/FLAGca3f174ab [2021-12-06 18:27:40,043 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data/ca34744f9/0c725fcf48244ab792c8dbcb4539ba19 [2021-12-06 18:27:40,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:27:40,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:27:40,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:27:40,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:27:40,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:27:40,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463b5016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40, skipping insertion in model container [2021-12-06 18:27:40,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:27:40,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:27:40,165 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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/sv-benchmarks/c/array-tiling/pr4.c[394,407] [2021-12-06 18:27:40,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:27:40,185 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:27:40,195 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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/sv-benchmarks/c/array-tiling/pr4.c[394,407] [2021-12-06 18:27:40,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:27:40,212 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:27:40,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40 WrapperNode [2021-12-06 18:27:40,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:27:40,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:27:40,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:27:40,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:27:40,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,239 INFO L137 Inliner]: procedures = 15, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2021-12-06 18:27:40,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:27:40,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:27:40,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:27:40,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:27:40,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:27:40,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:27:40,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:27:40,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:27:40,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (1/1) ... [2021-12-06 18:27:40,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:27:40,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:40,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:27:40,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:27:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:27:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:27:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:27:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:27:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:27:40,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:27:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:27:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:27:40,385 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:27:40,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:27:40,502 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:27:40,507 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:27:40,507 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:27:40,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:27:40 BoogieIcfgContainer [2021-12-06 18:27:40,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:27:40,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:27:40,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:27:40,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:27:40,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:27:40" (1/3) ... [2021-12-06 18:27:40,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ec483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:27:40, skipping insertion in model container [2021-12-06 18:27:40,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:40" (2/3) ... [2021-12-06 18:27:40,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ec483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:27:40, skipping insertion in model container [2021-12-06 18:27:40,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:27:40" (3/3) ... [2021-12-06 18:27:40,515 INFO L111 eAbstractionObserver]: Analyzing ICFG pr4.c [2021-12-06 18:27:40,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:27:40,519 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:27:40,554 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:27:40,559 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 18:27:40,559 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:27:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 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 18:27:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:27:40,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:40,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:40,576 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash -260661418, now seen corresponding path program 1 times [2021-12-06 18:27:40,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:40,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968225656] [2021-12-06 18:27:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:40,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:40,708 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 18:27:40,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968225656] [2021-12-06 18:27:40,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968225656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:40,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:40,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:27:40,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079413636] [2021-12-06 18:27:40,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:40,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:27:40,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:27:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:27:40,742 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:40,754 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2021-12-06 18:27:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:27:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:27:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:40,761 INFO L225 Difference]: With dead ends: 47 [2021-12-06 18:27:40,761 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 18:27:40,763 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 18:27:40,766 INFO L933 BasicCegarLoop]: 34 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, 34 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 18:27:40,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 18:27:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-06 18:27:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-12-06 18:27:40,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2021-12-06 18:27:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:40,790 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-06 18:27:40,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-12-06 18:27:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:27:40,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:40,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:40,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:27:40,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 451593979, now seen corresponding path program 1 times [2021-12-06 18:27:40,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:40,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587129796] [2021-12-06 18:27:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:40,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:40,850 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 18:27:40,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:40,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587129796] [2021-12-06 18:27:40,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587129796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:40,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:40,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:27:40,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121975154] [2021-12-06 18:27:40,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:40,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:27:40,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:27:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:27:40,853 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:40,880 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-12-06 18:27:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:27:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:27:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:40,881 INFO L225 Difference]: With dead ends: 30 [2021-12-06 18:27:40,881 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 18:27:40,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:27:40,882 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:40,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 18:27:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-06 18:27:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-12-06 18:27:40,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2021-12-06 18:27:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:40,887 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-12-06 18:27:40,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-12-06 18:27:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:27:40,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:40,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:40,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:27:40,888 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash 451653561, now seen corresponding path program 1 times [2021-12-06 18:27:40,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:40,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111970264] [2021-12-06 18:27:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:40,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:41,016 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 18:27:41,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:41,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111970264] [2021-12-06 18:27:41,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111970264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:41,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:41,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:27:41,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086979277] [2021-12-06 18:27:41,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:41,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:27:41,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:27:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:27:41,019 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:41,078 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-12-06 18:27:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:27:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:27:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:41,079 INFO L225 Difference]: With dead ends: 40 [2021-12-06 18:27:41,079 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 18:27:41,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:27:41,081 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:41,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 18:27:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-06 18:27:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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 18:27:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-06 18:27:41,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 13 [2021-12-06 18:27:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:41,087 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-06 18:27:41,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-06 18:27:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:27:41,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:41,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:41,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:27:41,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:41,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:41,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1654662766, now seen corresponding path program 1 times [2021-12-06 18:27:41,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:41,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640077288] [2021-12-06 18:27:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:41,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:41,303 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 18:27:41,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:41,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640077288] [2021-12-06 18:27:41,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640077288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:41,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208259040] [2021-12-06 18:27:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:41,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:41,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:41,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:27:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:41,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:27:41,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:41,448 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 18:27:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:41,479 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 29 treesize of output 28 [2021-12-06 18:27:41,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:41,498 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 29 treesize of output 28 [2021-12-06 18:27:41,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:41,518 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 21 treesize of output 20 [2021-12-06 18:27:41,594 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 18:27:41,619 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 18:27:41,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:41,742 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 15 treesize of output 13 [2021-12-06 18:27:41,746 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 24 treesize of output 22 [2021-12-06 18:27:41,763 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 18:27:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208259040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:41,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:41,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2021-12-06 18:27:41,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870769414] [2021-12-06 18:27:41,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:41,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:27:41,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:27:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:27:41,766 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 18:27:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:42,224 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-12-06 18:27:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:27:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) Word has length 19 [2021-12-06 18:27:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:42,227 INFO L225 Difference]: With dead ends: 120 [2021-12-06 18:27:42,227 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 18:27:42,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:27:42,229 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:42,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 131 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:27:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 18:27:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 33. [2021-12-06 18:27:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.375) internal successors, (44), 32 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 18:27:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-12-06 18:27:42,238 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 19 [2021-12-06 18:27:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:42,239 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-12-06 18:27:42,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 18:27:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-12-06 18:27:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:27:42,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:42,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:42,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:27:42,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:42,441 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1912828204, now seen corresponding path program 1 times [2021-12-06 18:27:42,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:42,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515404498] [2021-12-06 18:27:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:42,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:42,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515404498] [2021-12-06 18:27:42,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515404498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:42,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:42,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:27:42,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655649199] [2021-12-06 18:27:42,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:42,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:27:42,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:27:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:27:42,517 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:42,582 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-12-06 18:27:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:27:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:27:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:42,584 INFO L225 Difference]: With dead ends: 60 [2021-12-06 18:27:42,584 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 18:27:42,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:27:42,585 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:42,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 49 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 18:27:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-06 18:27:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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 18:27:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-06 18:27:42,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 19 [2021-12-06 18:27:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:42,594 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-06 18:27:42,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-06 18:27:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:27:42,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:42,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:42,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:27:42,596 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:42,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1519801194, now seen corresponding path program 1 times [2021-12-06 18:27:42,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:42,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696618319] [2021-12-06 18:27:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:42,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:42,724 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 18:27:42,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696618319] [2021-12-06 18:27:42,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696618319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117463890] [2021-12-06 18:27:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:42,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:42,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:42,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:42,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:27:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:42,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:27:42,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:42,784 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 18:27:42,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:42,801 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 29 treesize of output 28 [2021-12-06 18:27:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:42,815 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 29 treesize of output 28 [2021-12-06 18:27:42,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:42,831 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 37 treesize of output 36 [2021-12-06 18:27:42,883 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 18:27:42,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:42,952 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 13 [2021-12-06 18:27:42,954 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 24 treesize of output 22 [2021-12-06 18:27:42,967 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 18:27:42,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117463890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:42,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:42,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2021-12-06 18:27:42,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333474591] [2021-12-06 18:27:42,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:42,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:27:42,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:27:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:27:42,969 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:43,216 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2021-12-06 18:27:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:27:43,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:27:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:43,217 INFO L225 Difference]: With dead ends: 103 [2021-12-06 18:27:43,217 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 18:27:43,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:27:43,218 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:43,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 107 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:27:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 18:27:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 43. [2021-12-06 18:27:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-12-06 18:27:43,224 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 19 [2021-12-06 18:27:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:43,224 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-12-06 18:27:43,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-12-06 18:27:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:27:43,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:43,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:43,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:27:43,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:43,427 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2022900031, now seen corresponding path program 1 times [2021-12-06 18:27:43,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:43,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499994885] [2021-12-06 18:27:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:43,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:43,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:43,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499994885] [2021-12-06 18:27:43,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499994885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:43,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752783060] [2021-12-06 18:27:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:43,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:43,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:43,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:27:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:27:43,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:43,680 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 18:27:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:43,704 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 29 treesize of output 28 [2021-12-06 18:27:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:43,714 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 18:27:43,806 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 18:27:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:43,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:43,930 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 17 treesize of output 15 [2021-12-06 18:27:43,932 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 34 treesize of output 30 [2021-12-06 18:27:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:43,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752783060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:43,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:43,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-06 18:27:43,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991998701] [2021-12-06 18:27:43,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:43,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:27:43,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:27:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:27:43,990 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:44,668 INFO L93 Difference]: Finished difference Result 189 states and 243 transitions. [2021-12-06 18:27:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:27:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-12-06 18:27:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:44,669 INFO L225 Difference]: With dead ends: 189 [2021-12-06 18:27:44,669 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 18:27:44,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=487, Invalid=1865, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:27:44,671 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 415 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:44,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 177 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:27:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 18:27:44,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 62. [2021-12-06 18:27:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 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 18:27:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-12-06 18:27:44,678 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 25 [2021-12-06 18:27:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:44,679 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-12-06 18:27:44,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-12-06 18:27:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:27:44,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:44,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:44,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:27:44,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 18:27:44,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:44,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1855836577, now seen corresponding path program 1 times [2021-12-06 18:27:44,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:44,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369508868] [2021-12-06 18:27:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:44,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:44,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:44,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369508868] [2021-12-06 18:27:44,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369508868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:44,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:44,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:27:44,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969266592] [2021-12-06 18:27:44,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:44,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:27:44,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:27:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:27:44,901 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:44,915 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2021-12-06 18:27:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:27:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 18:27:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:44,915 INFO L225 Difference]: With dead ends: 94 [2021-12-06 18:27:44,916 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 18:27:44,916 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 18:27:44,916 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:44,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 41 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 18:27:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-12-06 18:27:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-06 18:27:44,921 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 25 [2021-12-06 18:27:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:44,921 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-06 18:27:44,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-06 18:27:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:27:44,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:44,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:44,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:27:44,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1963473599, now seen corresponding path program 1 times [2021-12-06 18:27:44,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:44,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375500907] [2021-12-06 18:27:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:44,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:45,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375500907] [2021-12-06 18:27:45,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375500907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:45,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907917953] [2021-12-06 18:27:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:45,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:45,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:45,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:45,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:27:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:27:45,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:45,093 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 18:27:45,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:45,103 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 29 treesize of output 28 [2021-12-06 18:27:45,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:45,116 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 37 treesize of output 36 [2021-12-06 18:27:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:45,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:45,238 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 17 treesize of output 15 [2021-12-06 18:27:45,239 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 30 treesize of output 26 [2021-12-06 18:27:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:45,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907917953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:45,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:45,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 15 [2021-12-06 18:27:45,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247145079] [2021-12-06 18:27:45,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:45,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:27:45,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:27:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:27:45,253 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 18:27:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:45,543 INFO L93 Difference]: Finished difference Result 144 states and 179 transitions. [2021-12-06 18:27:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:27:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) Word has length 25 [2021-12-06 18:27:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:45,544 INFO L225 Difference]: With dead ends: 144 [2021-12-06 18:27:45,545 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 18:27:45,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 18:27:45,546 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 160 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:45,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 120 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:27:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 18:27:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 65. [2021-12-06 18:27:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.296875) internal successors, (83), 64 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 18:27:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2021-12-06 18:27:45,555 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 25 [2021-12-06 18:27:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:45,556 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2021-12-06 18:27:45,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 18:27:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2021-12-06 18:27:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:27:45,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:45,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:45,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:27:45,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:45,759 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1272777940, now seen corresponding path program 2 times [2021-12-06 18:27:45,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:45,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947679875] [2021-12-06 18:27:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:45,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:45,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:45,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947679875] [2021-12-06 18:27:45,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947679875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:45,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129896946] [2021-12-06 18:27:45,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:27:45,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:45,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:45,868 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:45,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:27:45,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:27:45,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:45,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:27:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:45,935 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 18:27:45,958 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:27:45,958 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 23 treesize of output 22 [2021-12-06 18:27:46,035 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 18:27:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:46,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:46,105 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 17 treesize of output 15 [2021-12-06 18:27:46,107 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 30 treesize of output 26 [2021-12-06 18:27:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:46,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129896946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:46,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:46,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2021-12-06 18:27:46,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053151300] [2021-12-06 18:27:46,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:46,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:27:46,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:27:46,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:27:46,120 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:46,447 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-12-06 18:27:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:27:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:27:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:46,448 INFO L225 Difference]: With dead ends: 196 [2021-12-06 18:27:46,448 INFO L226 Difference]: Without dead ends: 186 [2021-12-06 18:27:46,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:27:46,449 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:46,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 107 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:27:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-06 18:27:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 86. [2021-12-06 18:27:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 85 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2021-12-06 18:27:46,456 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 31 [2021-12-06 18:27:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:46,456 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2021-12-06 18:27:46,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2021-12-06 18:27:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:27:46,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:46,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:46,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:27:46,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:27:46,658 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:46,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1491632658, now seen corresponding path program 1 times [2021-12-06 18:27:46,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:46,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097725632] [2021-12-06 18:27:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:46,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:46,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:46,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097725632] [2021-12-06 18:27:46,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097725632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:46,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310838366] [2021-12-06 18:27:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:46,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:46,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:46,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:27:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:27:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:46,807 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 18:27:46,817 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:27:46,817 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 23 treesize of output 22 [2021-12-06 18:27:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:46,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:46,942 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 17 treesize of output 15 [2021-12-06 18:27:46,943 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 30 treesize of output 26 [2021-12-06 18:27:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:46,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310838366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:46,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:46,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2021-12-06 18:27:46,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304364436] [2021-12-06 18:27:46,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:46,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:27:46,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:27:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:27:46,954 INFO L87 Difference]: Start difference. First operand 86 states and 111 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:47,378 INFO L93 Difference]: Finished difference Result 313 states and 403 transitions. [2021-12-06 18:27:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:27:47,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:27:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:47,379 INFO L225 Difference]: With dead ends: 313 [2021-12-06 18:27:47,380 INFO L226 Difference]: Without dead ends: 311 [2021-12-06 18:27:47,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 18:27:47,381 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:47,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 144 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:27:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-06 18:27:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 123. [2021-12-06 18:27:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2950819672131149) internal successors, (158), 122 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 18:27:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2021-12-06 18:27:47,390 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 31 [2021-12-06 18:27:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:47,391 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2021-12-06 18:27:47,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2021-12-06 18:27:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:27:47,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:47,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:47,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:27:47,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:27:47,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:47,595 INFO L85 PathProgramCache]: Analyzing trace with hash -613557008, now seen corresponding path program 1 times [2021-12-06 18:27:47,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:47,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545094524] [2021-12-06 18:27:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:47,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:27:47,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:47,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545094524] [2021-12-06 18:27:47,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545094524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:47,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:47,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:27:47,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762057742] [2021-12-06 18:27:47,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:47,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:27:47,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:27:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:27:47,647 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:47,665 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2021-12-06 18:27:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:27:47,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:27:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:47,666 INFO L225 Difference]: With dead ends: 172 [2021-12-06 18:27:47,666 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 18:27:47,667 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 18:27:47,667 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:47,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 18:27:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 123. [2021-12-06 18:27:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.278688524590164) internal successors, (156), 122 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 18:27:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2021-12-06 18:27:47,675 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 31 [2021-12-06 18:27:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:47,675 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2021-12-06 18:27:47,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2021-12-06 18:27:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:27:47,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:47,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:47,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:27:47,676 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash -830647440, now seen corresponding path program 2 times [2021-12-06 18:27:47,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:47,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111303413] [2021-12-06 18:27:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:47,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:27:47,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:47,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111303413] [2021-12-06 18:27:47,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111303413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:47,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:47,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:27:47,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786150648] [2021-12-06 18:27:47,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:47,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:27:47,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:27:47,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:27:47,695 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:47,712 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2021-12-06 18:27:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:27:47,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:27:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:47,713 INFO L225 Difference]: With dead ends: 155 [2021-12-06 18:27:47,713 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 18:27:47,713 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 18:27:47,714 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:47,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 55 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 18:27:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2021-12-06 18:27:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.2666666666666666) internal successors, (133), 105 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2021-12-06 18:27:47,720 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 31 [2021-12-06 18:27:47,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:47,720 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2021-12-06 18:27:47,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2021-12-06 18:27:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:27:47,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:47,721 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:47,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:27:47,721 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2136932185, now seen corresponding path program 3 times [2021-12-06 18:27:47,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:47,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087887588] [2021-12-06 18:27:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:47,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:47,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:47,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087887588] [2021-12-06 18:27:47,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087887588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:47,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783536406] [2021-12-06 18:27:47,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:27:47,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:47,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:47,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:27:47,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 18:27:47,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:47,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:27:47,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:47,905 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 18:27:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:48,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:48,081 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 17 treesize of output 15 [2021-12-06 18:27:48,083 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 30 treesize of output 26 [2021-12-06 18:27:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:48,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783536406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:48,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:48,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2021-12-06 18:27:48,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828880216] [2021-12-06 18:27:48,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:48,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:27:48,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:27:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:27:48,094 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 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 18:27:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:48,980 INFO L93 Difference]: Finished difference Result 437 states and 528 transitions. [2021-12-06 18:27:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 18:27:48,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 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 37 [2021-12-06 18:27:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:48,983 INFO L225 Difference]: With dead ends: 437 [2021-12-06 18:27:48,983 INFO L226 Difference]: Without dead ends: 435 [2021-12-06 18:27:48,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=4546, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 18:27:48,985 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 291 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:48,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 249 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:27:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-06 18:27:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 232. [2021-12-06 18:27:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.2943722943722944) internal successors, (299), 231 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 299 transitions. [2021-12-06 18:27:48,998 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 299 transitions. Word has length 37 [2021-12-06 18:27:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:48,998 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 299 transitions. [2021-12-06 18:27:48,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 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 18:27:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 299 transitions. [2021-12-06 18:27:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:27:48,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:48,999 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:49,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:27:49,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:49,201 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:49,202 INFO L85 PathProgramCache]: Analyzing trace with hash 234807077, now seen corresponding path program 1 times [2021-12-06 18:27:49,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:49,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203725403] [2021-12-06 18:27:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:49,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:49,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203725403] [2021-12-06 18:27:49,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203725403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952695904] [2021-12-06 18:27:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:49,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:49,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:49,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:27:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:27:49,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:49,412 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 18:27:49,507 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 18:27:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:49,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:49,583 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 17 treesize of output 15 [2021-12-06 18:27:49,585 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 30 treesize of output 26 [2021-12-06 18:27:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:49,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952695904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:49,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:49,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-12-06 18:27:49,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341350364] [2021-12-06 18:27:49,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:49,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:27:49,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:49,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:27:49,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:27:49,599 INFO L87 Difference]: Start difference. First operand 232 states and 299 transitions. Second operand has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:50,304 INFO L93 Difference]: Finished difference Result 568 states and 706 transitions. [2021-12-06 18:27:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 18:27:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 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 37 [2021-12-06 18:27:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:50,307 INFO L225 Difference]: With dead ends: 568 [2021-12-06 18:27:50,307 INFO L226 Difference]: Without dead ends: 485 [2021-12-06 18:27:50,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=481, Invalid=2275, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:27:50,308 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 163 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:50,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 242 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:27:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-06 18:27:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 313. [2021-12-06 18:27:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.2628205128205128) internal successors, (394), 312 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 394 transitions. [2021-12-06 18:27:50,327 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 394 transitions. Word has length 37 [2021-12-06 18:27:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:50,328 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 394 transitions. [2021-12-06 18:27:50,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 394 transitions. [2021-12-06 18:27:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:27:50,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:50,329 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:50,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:27:50,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:27:50,531 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:50,532 INFO L85 PathProgramCache]: Analyzing trace with hash -81425862, now seen corresponding path program 4 times [2021-12-06 18:27:50,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:50,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828371638] [2021-12-06 18:27:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:50,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:50,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:50,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828371638] [2021-12-06 18:27:50,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828371638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:50,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582429631] [2021-12-06 18:27:50,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:27:50,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:50,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:50,747 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:50,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:27:50,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:27:50,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:50,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:27:50,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:51,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:51,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582429631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:51,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:51,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2021-12-06 18:27:51,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725308625] [2021-12-06 18:27:51,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:51,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:27:51,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:27:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:27:51,165 INFO L87 Difference]: Start difference. First operand 313 states and 394 transitions. Second operand has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 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 18:27:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:51,342 INFO L93 Difference]: Finished difference Result 486 states and 581 transitions. [2021-12-06 18:27:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:27:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 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) Word has length 43 [2021-12-06 18:27:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:51,344 INFO L225 Difference]: With dead ends: 486 [2021-12-06 18:27:51,344 INFO L226 Difference]: Without dead ends: 375 [2021-12-06 18:27:51,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=927, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:27:51,345 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 349 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:51,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 138 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:27:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-06 18:27:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 317. [2021-12-06 18:27:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.240506329113924) internal successors, (392), 316 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 392 transitions. [2021-12-06 18:27:51,364 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 392 transitions. Word has length 43 [2021-12-06 18:27:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:51,364 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 392 transitions. [2021-12-06 18:27:51,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 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 18:27:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 392 transitions. [2021-12-06 18:27:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:27:51,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:51,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:51,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:27:51,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:51,566 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1283752644, now seen corresponding path program 1 times [2021-12-06 18:27:51,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:51,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812128409] [2021-12-06 18:27:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:51,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 18:27:51,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:51,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812128409] [2021-12-06 18:27:51,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812128409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:51,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:51,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:27:51,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791459410] [2021-12-06 18:27:51,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:51,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:27:51,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:27:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:27:51,588 INFO L87 Difference]: Start difference. First operand 317 states and 392 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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 18:27:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:51,619 INFO L93 Difference]: Finished difference Result 571 states and 693 transitions. [2021-12-06 18:27:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:27:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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) Word has length 43 [2021-12-06 18:27:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:51,621 INFO L225 Difference]: With dead ends: 571 [2021-12-06 18:27:51,621 INFO L226 Difference]: Without dead ends: 389 [2021-12-06 18:27:51,622 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 18:27:51,622 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:51,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:51,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-06 18:27:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 323. [2021-12-06 18:27:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.2173913043478262) internal successors, (392), 322 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 392 transitions. [2021-12-06 18:27:51,641 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 392 transitions. Word has length 43 [2021-12-06 18:27:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:51,641 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 392 transitions. [2021-12-06 18:27:51,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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 18:27:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 392 transitions. [2021-12-06 18:27:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:27:51,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:51,642 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:51,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:27:51,642 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash 548376636, now seen corresponding path program 2 times [2021-12-06 18:27:51,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:51,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821434749] [2021-12-06 18:27:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:51,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:27:51,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821434749] [2021-12-06 18:27:51,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821434749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:51,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:51,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:27:51,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705179482] [2021-12-06 18:27:51,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:51,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:27:51,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:27:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:27:51,663 INFO L87 Difference]: Start difference. First operand 323 states and 392 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:51,691 INFO L93 Difference]: Finished difference Result 407 states and 482 transitions. [2021-12-06 18:27:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:27:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 18:27:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:51,692 INFO L225 Difference]: With dead ends: 407 [2021-12-06 18:27:51,692 INFO L226 Difference]: Without dead ends: 290 [2021-12-06 18:27:51,693 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 18:27:51,693 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:51,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-06 18:27:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 257. [2021-12-06 18:27:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.19921875) internal successors, (307), 256 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 18:27:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 307 transitions. [2021-12-06 18:27:51,709 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 307 transitions. Word has length 43 [2021-12-06 18:27:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:51,709 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 307 transitions. [2021-12-06 18:27:51,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 307 transitions. [2021-12-06 18:27:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:27:51,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:51,710 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:51,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:27:51,710 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash -457370065, now seen corresponding path program 5 times [2021-12-06 18:27:51,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:51,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863202419] [2021-12-06 18:27:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:51,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:51,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:51,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863202419] [2021-12-06 18:27:51,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863202419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:51,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715784494] [2021-12-06 18:27:51,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:27:51,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:51,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:51,875 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:51,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:27:51,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 18:27:51,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 18:27:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:52,018 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 18:27:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:52,061 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 18:27:52,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:52,070 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 18:27:52,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:52,080 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 18:27:52,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:52,092 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 18:27:52,265 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 28 treesize of output 16 [2021-12-06 18:27:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:27:52,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:54,591 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (or (forall ((v_ArrVal_387 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_93| 16) (- 4)) v_ArrVal_387) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:27:54,607 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 18:27:54,609 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 200 treesize of output 192 [2021-12-06 18:27:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2021-12-06 18:27:54,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715784494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:54,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:54,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 33 [2021-12-06 18:27:54,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291391520] [2021-12-06 18:27:54,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:54,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:27:54,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:27:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=895, Unknown=1, NotChecked=60, Total=1056 [2021-12-06 18:27:54,693 INFO L87 Difference]: Start difference. First operand 257 states and 307 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:56,811 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~i~0#1| 16))) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (or (forall ((v_ArrVal_387 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_93| 16) (- 4)) v_ArrVal_387) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (= |c_ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= |c_ULTIMATE.start_main_~i~0#1| 1) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|)) is different from false [2021-12-06 18:27:58,829 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (= (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~i~0#1| 16))) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (or (forall ((v_ArrVal_387 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_93| 16) (- 4)) v_ArrVal_387) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (= |c_ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (< (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2021-12-06 18:28:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:01,236 INFO L93 Difference]: Finished difference Result 698 states and 794 transitions. [2021-12-06 18:28:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 18:28:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 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 49 [2021-12-06 18:28:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:01,239 INFO L225 Difference]: With dead ends: 698 [2021-12-06 18:28:01,239 INFO L226 Difference]: Without dead ends: 688 [2021-12-06 18:28:01,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4575 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1492, Invalid=13523, Unknown=3, NotChecked=732, Total=15750 [2021-12-06 18:28:01,243 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 620 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:01,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 799 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 2073 Invalid, 0 Unknown, 249 Unchecked, 0.8s Time] [2021-12-06 18:28:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-06 18:28:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 335. [2021-12-06 18:28:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.1646706586826348) internal successors, (389), 334 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 389 transitions. [2021-12-06 18:28:01,266 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 389 transitions. Word has length 49 [2021-12-06 18:28:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:01,266 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 389 transitions. [2021-12-06 18:28:01,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 389 transitions. [2021-12-06 18:28:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:28:01,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:01,267 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:01,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:28:01,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:01,469 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash -171220375, now seen corresponding path program 2 times [2021-12-06 18:28:01,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:01,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874378103] [2021-12-06 18:28:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:01,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:01,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:01,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874378103] [2021-12-06 18:28:01,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874378103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:01,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95417682] [2021-12-06 18:28:01,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:01,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:01,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:01,611 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:01,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:28:01,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:01,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:01,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:28:01,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:01,683 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 18:28:01,695 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:28:01,695 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 29 treesize of output 28 [2021-12-06 18:28:01,706 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:28:01,706 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 29 treesize of output 28 [2021-12-06 18:28:01,719 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:28:01,719 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 29 treesize of output 28 [2021-12-06 18:28:01,859 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:28:01,860 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 24 treesize of output 10 [2021-12-06 18:28:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:01,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:01,957 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 17 treesize of output 15 [2021-12-06 18:28:01,959 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 34 treesize of output 30 [2021-12-06 18:28:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:01,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95417682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:01,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:01,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 17 [2021-12-06 18:28:01,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136917704] [2021-12-06 18:28:01,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:01,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:28:01,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:28:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:28:01,996 INFO L87 Difference]: Start difference. First operand 335 states and 389 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:02,821 INFO L93 Difference]: Finished difference Result 643 states and 725 transitions. [2021-12-06 18:28:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 18:28:02,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 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 49 [2021-12-06 18:28:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:02,824 INFO L225 Difference]: With dead ends: 643 [2021-12-06 18:28:02,824 INFO L226 Difference]: Without dead ends: 633 [2021-12-06 18:28:02,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 18:28:02,825 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 133 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:02,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 334 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:28:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-12-06 18:28:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 355. [2021-12-06 18:28:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.1610169491525424) internal successors, (411), 354 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 411 transitions. [2021-12-06 18:28:02,850 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 411 transitions. Word has length 49 [2021-12-06 18:28:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:02,850 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 411 transitions. [2021-12-06 18:28:02,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 411 transitions. [2021-12-06 18:28:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:28:02,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:02,851 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:02,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:28:03,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:03,052 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash -317440667, now seen corresponding path program 1 times [2021-12-06 18:28:03,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:03,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252004189] [2021-12-06 18:28:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:03,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:03,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:03,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252004189] [2021-12-06 18:28:03,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252004189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:03,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202167620] [2021-12-06 18:28:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:03,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:03,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:03,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:03,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:28:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:03,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 18:28:03,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:03,228 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 18:28:03,240 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:28:03,240 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 29 treesize of output 28 [2021-12-06 18:28:03,253 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:28:03,253 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 29 treesize of output 28 [2021-12-06 18:28:03,265 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:28:03,265 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 29 treesize of output 28 [2021-12-06 18:28:03,387 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:28:03,387 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 42 treesize of output 20 [2021-12-06 18:28:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:03,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:03,474 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 17 treesize of output 15 [2021-12-06 18:28:03,476 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 30 treesize of output 26 [2021-12-06 18:28:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:03,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202167620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:03,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:03,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2021-12-06 18:28:03,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45308923] [2021-12-06 18:28:03,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:03,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:28:03,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:03,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:28:03,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:28:03,490 INFO L87 Difference]: Start difference. First operand 355 states and 411 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:04,675 INFO L93 Difference]: Finished difference Result 733 states and 833 transitions. [2021-12-06 18:28:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-06 18:28:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 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 49 [2021-12-06 18:28:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:04,679 INFO L225 Difference]: With dead ends: 733 [2021-12-06 18:28:04,679 INFO L226 Difference]: Without dead ends: 731 [2021-12-06 18:28:04,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=896, Invalid=7476, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 18:28:04,684 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 248 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:04,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 303 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:28:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-06 18:28:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 369. [2021-12-06 18:28:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.1603260869565217) internal successors, (427), 368 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 427 transitions. [2021-12-06 18:28:04,717 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 427 transitions. Word has length 49 [2021-12-06 18:28:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:04,717 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 427 transitions. [2021-12-06 18:28:04,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:04,718 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 427 transitions. [2021-12-06 18:28:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:28:04,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:04,718 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:04,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:28:04,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 18:28:04,920 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1701767808, now seen corresponding path program 6 times [2021-12-06 18:28:04,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472343291] [2021-12-06 18:28:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:04,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:05,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:05,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472343291] [2021-12-06 18:28:05,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472343291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:05,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925917762] [2021-12-06 18:28:05,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:28:05,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:05,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:05,108 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:05,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:28:05,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 18:28:05,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:05,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:28:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:05,283 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 16 treesize of output 12 [2021-12-06 18:28:05,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,311 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 29 treesize of output 28 [2021-12-06 18:28:05,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,325 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 29 treesize of output 28 [2021-12-06 18:28:05,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,344 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 29 treesize of output 28 [2021-12-06 18:28:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-12-06 18:28:05,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:05,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2021-12-06 18:28:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:05,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-12-06 18:28:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:05,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:05,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-12-06 18:28:06,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:06,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-12-06 18:28:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:06,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:07,022 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 75 treesize of output 71 [2021-12-06 18:28:07,035 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:28:07,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 88738 treesize of output 87202 [2021-12-06 18:31:35,195 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 18:31:35,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:31:35,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-06 18:31:35,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494362367] [2021-12-06 18:31:35,195 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:35,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:31:35,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:31:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:31:35,197 INFO L87 Difference]: Start difference. First operand 369 states and 427 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 18:31:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:35,748 INFO L93 Difference]: Finished difference Result 513 states and 575 transitions. [2021-12-06 18:31:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:31:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) Word has length 55 [2021-12-06 18:31:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:35,750 INFO L225 Difference]: With dead ends: 513 [2021-12-06 18:31:35,750 INFO L226 Difference]: Without dead ends: 503 [2021-12-06 18:31:35,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=366, Invalid=3924, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 18:31:35,752 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 110 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:35,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 273 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:31:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-12-06 18:31:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2021-12-06 18:31:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1492537313432836) internal successors, (462), 402 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 462 transitions. [2021-12-06 18:31:35,780 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 462 transitions. Word has length 55 [2021-12-06 18:31:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:35,780 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 462 transitions. [2021-12-06 18:31:35,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 18:31:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 462 transitions. [2021-12-06 18:31:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:31:35,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:35,781 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:35,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:31:35,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:35,982 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash -607563004, now seen corresponding path program 1 times [2021-12-06 18:31:35,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577238103] [2021-12-06 18:31:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:35,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 18:31:36,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:36,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577238103] [2021-12-06 18:31:36,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577238103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:31:36,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:31:36,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:31:36,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59750908] [2021-12-06 18:31:36,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:31:36,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:31:36,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:31:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:31:36,004 INFO L87 Difference]: Start difference. First operand 403 states and 462 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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 18:31:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:36,049 INFO L93 Difference]: Finished difference Result 594 states and 678 transitions. [2021-12-06 18:31:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:31:36,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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) Word has length 55 [2021-12-06 18:31:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:36,051 INFO L225 Difference]: With dead ends: 594 [2021-12-06 18:31:36,051 INFO L226 Difference]: Without dead ends: 337 [2021-12-06 18:31:36,051 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 18:31:36,051 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:36,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 43 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:31:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-06 18:31:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 275. [2021-12-06 18:31:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.1094890510948905) internal successors, (304), 274 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 304 transitions. [2021-12-06 18:31:36,074 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 304 transitions. Word has length 55 [2021-12-06 18:31:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:36,074 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 304 transitions. [2021-12-06 18:31:36,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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 18:31:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 304 transitions. [2021-12-06 18:31:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:31:36,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:36,075 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:36,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:31:36,075 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1145302404, now seen corresponding path program 3 times [2021-12-06 18:31:36,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:36,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483778594] [2021-12-06 18:31:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:36,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:36,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:36,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483778594] [2021-12-06 18:31:36,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483778594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:36,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583301212] [2021-12-06 18:31:36,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:31:36,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:36,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:36,213 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:36,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:31:36,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:31:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 18:31:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:36,401 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 18:31:36,421 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:31:36,421 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 29 treesize of output 28 [2021-12-06 18:31:36,429 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:31:36,429 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 23 treesize of output 22 [2021-12-06 18:31:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:36,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:37,008 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 31 [2021-12-06 18:31:37,010 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 67 treesize of output 59 [2021-12-06 18:31:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:37,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583301212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:37,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:37,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2021-12-06 18:31:37,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180764595] [2021-12-06 18:31:37,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:37,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:31:37,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:31:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 18:31:37,185 INFO L87 Difference]: Start difference. First operand 275 states and 304 transitions. Second operand has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:42,596 INFO L93 Difference]: Finished difference Result 949 states and 1041 transitions. [2021-12-06 18:31:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-12-06 18:31:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 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 55 [2021-12-06 18:31:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:42,599 INFO L225 Difference]: With dead ends: 949 [2021-12-06 18:31:42,599 INFO L226 Difference]: Without dead ends: 939 [2021-12-06 18:31:42,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13123 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3741, Invalid=32549, Unknown=0, NotChecked=0, Total=36290 [2021-12-06 18:31:42,603 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 887 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:42,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 374 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 18:31:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-12-06 18:31:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 321. [2021-12-06 18:31:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.10625) internal successors, (354), 320 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 354 transitions. [2021-12-06 18:31:42,633 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 354 transitions. Word has length 55 [2021-12-06 18:31:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:42,633 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 354 transitions. [2021-12-06 18:31:42,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 354 transitions. [2021-12-06 18:31:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:31:42,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:42,634 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:42,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:31:42,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:31:42,835 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1260464045, now seen corresponding path program 7 times [2021-12-06 18:31:42,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:42,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943066602] [2021-12-06 18:31:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:42,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:42,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:42,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943066602] [2021-12-06 18:31:42,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943066602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:42,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613420428] [2021-12-06 18:31:42,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:31:42,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:42,970 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:42,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:31:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:31:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:43,058 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 18:31:43,069 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:31:43,069 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 29 treesize of output 28 [2021-12-06 18:31:43,263 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:31:43,263 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 24 treesize of output 10 [2021-12-06 18:31:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:43,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:43,340 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 17 treesize of output 15 [2021-12-06 18:31:43,342 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 34 treesize of output 30 [2021-12-06 18:31:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:43,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613420428] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:43,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:43,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2021-12-06 18:31:43,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86155533] [2021-12-06 18:31:43,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:43,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:31:43,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:43,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:31:43,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:31:43,375 INFO L87 Difference]: Start difference. First operand 321 states and 354 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 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 18:31:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:44,912 INFO L93 Difference]: Finished difference Result 703 states and 757 transitions. [2021-12-06 18:31:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 18:31:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 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 61 [2021-12-06 18:31:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:44,915 INFO L225 Difference]: With dead ends: 703 [2021-12-06 18:31:44,915 INFO L226 Difference]: Without dead ends: 687 [2021-12-06 18:31:44,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=810, Invalid=7022, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 18:31:44,916 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 229 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:44,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 495 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:31:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-12-06 18:31:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 369. [2021-12-06 18:31:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.1005434782608696) internal successors, (405), 368 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 405 transitions. [2021-12-06 18:31:44,950 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 405 transitions. Word has length 61 [2021-12-06 18:31:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:44,950 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 405 transitions. [2021-12-06 18:31:44,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 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 18:31:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 405 transitions. [2021-12-06 18:31:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:31:44,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:44,951 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:44,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:31:45,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:45,152 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2088818609, now seen corresponding path program 4 times [2021-12-06 18:31:45,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:45,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59692681] [2021-12-06 18:31:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:45,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:45,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59692681] [2021-12-06 18:31:45,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59692681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190092445] [2021-12-06 18:31:45,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:31:45,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:45,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:45,307 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:45,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:31:45,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:31:45,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:31:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:45,385 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 18:31:45,401 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:31:45,402 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 29 treesize of output 28 [2021-12-06 18:31:45,595 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:31:45,595 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 42 treesize of output 20 [2021-12-06 18:31:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:45,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:45,692 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 17 treesize of output 15 [2021-12-06 18:31:45,693 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 30 treesize of output 26 [2021-12-06 18:31:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:45,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190092445] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:45,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:45,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2021-12-06 18:31:45,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627312459] [2021-12-06 18:31:45,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:45,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:31:45,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:45,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:31:45,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:31:45,713 INFO L87 Difference]: Start difference. First operand 369 states and 405 transitions. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 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 18:31:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:49,375 INFO L93 Difference]: Finished difference Result 1246 states and 1369 transitions. [2021-12-06 18:31:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2021-12-06 18:31:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 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 61 [2021-12-06 18:31:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:49,379 INFO L225 Difference]: With dead ends: 1246 [2021-12-06 18:31:49,379 INFO L226 Difference]: Without dead ends: 1244 [2021-12-06 18:31:49,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 109 SyntacticMatches, 7 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23497 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3494, Invalid=51028, Unknown=0, NotChecked=0, Total=54522 [2021-12-06 18:31:49,384 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 487 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 3345 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 3345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:49,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 653 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 3345 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:31:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-12-06 18:31:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 367. [2021-12-06 18:31:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.098360655737705) internal successors, (402), 366 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 402 transitions. [2021-12-06 18:31:49,432 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 402 transitions. Word has length 61 [2021-12-06 18:31:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:49,432 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 402 transitions. [2021-12-06 18:31:49,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 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 18:31:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 402 transitions. [2021-12-06 18:31:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 18:31:49,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:49,433 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:49,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:31:49,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:31:49,634 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2143972188, now seen corresponding path program 2 times [2021-12-06 18:31:49,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:49,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251601455] [2021-12-06 18:31:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:49,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:49,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251601455] [2021-12-06 18:31:49,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251601455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525946278] [2021-12-06 18:31:49,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:31:49,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:49,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:49,832 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:49,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:31:49,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:31:49,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:49,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:31:49,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:49,936 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 18:31:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:50,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:50,791 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 31 [2021-12-06 18:31:50,793 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 67 treesize of output 59 [2021-12-06 18:31:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:50,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525946278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:50,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:50,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 41 [2021-12-06 18:31:50,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446005375] [2021-12-06 18:31:50,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:50,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:31:50,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:31:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:31:50,917 INFO L87 Difference]: Start difference. First operand 367 states and 402 transitions. Second operand has 41 states, 41 states have (on average 4.365853658536586) internal successors, (179), 41 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:53,353 INFO L93 Difference]: Finished difference Result 768 states and 840 transitions. [2021-12-06 18:31:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 18:31:53,353 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.365853658536586) internal successors, (179), 41 states have internal predecessors, (179), 0 states have call successors, (0), 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 67 [2021-12-06 18:31:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:53,356 INFO L225 Difference]: With dead ends: 768 [2021-12-06 18:31:53,356 INFO L226 Difference]: Without dead ends: 758 [2021-12-06 18:31:53,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2525 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1050, Invalid=9456, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 18:31:53,357 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 290 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:53,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 527 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1772 Invalid, 0 Unknown, 342 Unchecked, 0.8s Time] [2021-12-06 18:31:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-12-06 18:31:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 421. [2021-12-06 18:31:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.0928571428571427) internal successors, (459), 420 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 459 transitions. [2021-12-06 18:31:53,399 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 459 transitions. Word has length 67 [2021-12-06 18:31:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:53,399 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 459 transitions. [2021-12-06 18:31:53,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.365853658536586) internal successors, (179), 41 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 459 transitions. [2021-12-06 18:31:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 18:31:53,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:53,400 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:53,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:31:53,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:31:53,601 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash -371202082, now seen corresponding path program 2 times [2021-12-06 18:31:53,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:53,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495242884] [2021-12-06 18:31:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:53,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:53,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:53,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495242884] [2021-12-06 18:31:53,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495242884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:53,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437286170] [2021-12-06 18:31:53,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:31:53,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:53,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:53,745 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:53,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:31:53,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:31:53,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:31:53,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:53,824 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 18:31:54,078 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:31:54,078 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 42 treesize of output 20 [2021-12-06 18:31:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:54,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:54,160 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 17 treesize of output 15 [2021-12-06 18:31:54,161 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 30 treesize of output 26 [2021-12-06 18:31:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:54,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437286170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:54,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:54,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2021-12-06 18:31:54,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656648414] [2021-12-06 18:31:54,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:54,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:31:54,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:31:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:31:54,180 INFO L87 Difference]: Start difference. First operand 421 states and 459 transitions. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 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 18:31:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:58,903 INFO L93 Difference]: Finished difference Result 1303 states and 1428 transitions. [2021-12-06 18:31:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2021-12-06 18:31:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 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) Word has length 67 [2021-12-06 18:31:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:58,908 INFO L225 Difference]: With dead ends: 1303 [2021-12-06 18:31:58,908 INFO L226 Difference]: Without dead ends: 1301 [2021-12-06 18:31:58,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33012 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4692, Invalid=70658, Unknown=0, NotChecked=0, Total=75350 [2021-12-06 18:31:58,912 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 499 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 4566 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 4966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 4566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:58,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 797 Invalid, 4966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 4566 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 18:31:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-12-06 18:31:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 427. [2021-12-06 18:31:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.0938967136150235) internal successors, (466), 426 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 466 transitions. [2021-12-06 18:31:58,965 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 466 transitions. Word has length 67 [2021-12-06 18:31:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:58,965 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 466 transitions. [2021-12-06 18:31:58,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 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 18:31:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 466 transitions. [2021-12-06 18:31:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:31:58,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:58,966 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:58,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:31:59,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 18:31:59,167 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:59,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash 600772409, now seen corresponding path program 8 times [2021-12-06 18:31:59,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:59,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692074403] [2021-12-06 18:31:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:59,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 157 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:59,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692074403] [2021-12-06 18:31:59,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692074403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337471970] [2021-12-06 18:31:59,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:31:59,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:59,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:59,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:59,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:31:59,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:31:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:31:59,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 200 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:59,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 200 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:00,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337471970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:00,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:00,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 46 [2021-12-06 18:32:00,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951665189] [2021-12-06 18:32:00,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:00,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:32:00,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:00,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:32:00,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 18:32:00,203 INFO L87 Difference]: Start difference. First operand 427 states and 466 transitions. Second operand has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 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 18:32:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:00,486 INFO L93 Difference]: Finished difference Result 732 states and 794 transitions. [2021-12-06 18:32:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:32:00,486 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 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 73 [2021-12-06 18:32:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:00,488 INFO L225 Difference]: With dead ends: 732 [2021-12-06 18:32:00,488 INFO L226 Difference]: Without dead ends: 465 [2021-12-06 18:32:00,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=678, Invalid=2078, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:32:00,489 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 372 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:00,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 265 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:32:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-06 18:32:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 430. [2021-12-06 18:32:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.0862470862470863) internal successors, (466), 429 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 466 transitions. [2021-12-06 18:32:00,539 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 466 transitions. Word has length 73 [2021-12-06 18:32:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:00,539 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 466 transitions. [2021-12-06 18:32:00,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 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 18:32:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 466 transitions. [2021-12-06 18:32:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:32:00,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:00,540 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:00,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 18:32:00,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:32:00,741 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash -760676242, now seen corresponding path program 9 times [2021-12-06 18:32:00,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:00,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996851420] [2021-12-06 18:32:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:00,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:00,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:00,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996851420] [2021-12-06 18:32:00,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996851420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:00,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041415163] [2021-12-06 18:32:00,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:32:00,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:00,949 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:00,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:32:01,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:32:01,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:01,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 18:32:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:01,303 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 18:32:01,323 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:32:01,324 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 29 treesize of output 28 [2021-12-06 18:32:01,334 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:32:01,334 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 29 treesize of output 28 [2021-12-06 18:32:01,356 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:32:01,356 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 23 treesize of output 22 [2021-12-06 18:32:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:01,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:02,345 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 51 treesize of output 47 [2021-12-06 18:32:02,347 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 175 treesize of output 167 [2021-12-06 18:32:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:02,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041415163] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:02,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:02,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 54 [2021-12-06 18:32:02,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834508184] [2021-12-06 18:32:02,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:02,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 18:32:02,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 18:32:02,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2635, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:32:02,599 INFO L87 Difference]: Start difference. First operand 430 states and 466 transitions. Second operand has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:17,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:17,628 INFO L93 Difference]: Finished difference Result 1377 states and 1505 transitions. [2021-12-06 18:32:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-12-06 18:32:17,628 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 states have internal predecessors, (229), 0 states have call successors, (0), 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 79 [2021-12-06 18:32:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:17,632 INFO L225 Difference]: With dead ends: 1377 [2021-12-06 18:32:17,632 INFO L226 Difference]: Without dead ends: 1367 [2021-12-06 18:32:17,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 136 SyntacticMatches, 64 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39216 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=6824, Invalid=72982, Unknown=0, NotChecked=0, Total=79806 [2021-12-06 18:32:17,635 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1731 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 3558 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 5204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 3558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:17,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1731 Valid, 733 Invalid, 5204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 3558 Invalid, 0 Unknown, 180 Unchecked, 2.5s Time] [2021-12-06 18:32:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-12-06 18:32:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 515. [2021-12-06 18:32:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.083657587548638) internal successors, (557), 514 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 557 transitions. [2021-12-06 18:32:17,691 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 557 transitions. Word has length 79 [2021-12-06 18:32:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:17,692 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 557 transitions. [2021-12-06 18:32:17,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 557 transitions. [2021-12-06 18:32:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:32:17,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:17,693 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:17,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 18:32:17,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:17,893 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:17,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:17,894 INFO L85 PathProgramCache]: Analyzing trace with hash -538289983, now seen corresponding path program 10 times [2021-12-06 18:32:17,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:17,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625463232] [2021-12-06 18:32:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:17,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:18,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625463232] [2021-12-06 18:32:18,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625463232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:18,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8970656] [2021-12-06 18:32:18,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:32:18,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:18,123 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:18,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:32:18,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:32:18,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 18:32:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:18,326 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 18:32:18,354 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:32:18,354 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 29 treesize of output 28 [2021-12-06 18:32:18,364 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:32:18,364 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 23 treesize of output 22 [2021-12-06 18:32:18,736 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 18:32:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:18,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:19,103 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 17 treesize of output 15 [2021-12-06 18:32:19,105 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 34 treesize of output 30 [2021-12-06 18:32:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:19,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8970656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:19,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:19,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 53 [2021-12-06 18:32:19,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875351810] [2021-12-06 18:32:19,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:19,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 18:32:19,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 18:32:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2560, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:32:19,272 INFO L87 Difference]: Start difference. First operand 515 states and 557 transitions. Second operand has 53 states, 53 states have (on average 4.584905660377358) internal successors, (243), 53 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 18:32:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:29,207 INFO L93 Difference]: Finished difference Result 1275 states and 1365 transitions. [2021-12-06 18:32:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2021-12-06 18:32:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.584905660377358) internal successors, (243), 53 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 85 [2021-12-06 18:32:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:29,211 INFO L225 Difference]: With dead ends: 1275 [2021-12-06 18:32:29,211 INFO L226 Difference]: Without dead ends: 1251 [2021-12-06 18:32:29,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27873 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=6144, Invalid=70308, Unknown=0, NotChecked=0, Total=76452 [2021-12-06 18:32:29,214 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1037 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 6552 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 7376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 6552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:29,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 1615 Invalid, 7376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 6552 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 18:32:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-12-06 18:32:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 615. [2021-12-06 18:32:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.0895765472312704) internal successors, (669), 614 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 669 transitions. [2021-12-06 18:32:29,280 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 669 transitions. Word has length 85 [2021-12-06 18:32:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:29,280 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 669 transitions. [2021-12-06 18:32:29,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.584905660377358) internal successors, (243), 53 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 18:32:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 669 transitions. [2021-12-06 18:32:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:32:29,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:29,282 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:29,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 18:32:29,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 18:32:29,482 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1090907451, now seen corresponding path program 2 times [2021-12-06 18:32:29,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560742639] [2021-12-06 18:32:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:29,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:29,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:29,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560742639] [2021-12-06 18:32:29,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560742639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:29,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635583864] [2021-12-06 18:32:29,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:32:29,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:29,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:29,662 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:29,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:32:29,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:32:29,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 18:32:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:29,771 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 18:32:29,785 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:32:29,785 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 29 treesize of output 28 [2021-12-06 18:32:29,795 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:32:29,795 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 29 treesize of output 28 [2021-12-06 18:32:30,106 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:32:30,106 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 42 treesize of output 20 [2021-12-06 18:32:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:30,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:30,236 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 17 treesize of output 15 [2021-12-06 18:32:30,237 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 30 treesize of output 26 [2021-12-06 18:32:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:30,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635583864] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:30,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:30,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 29 [2021-12-06 18:32:30,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616089856] [2021-12-06 18:32:30,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:30,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 18:32:30,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:30,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 18:32:30,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:32:30,268 INFO L87 Difference]: Start difference. First operand 615 states and 669 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 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 18:32:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:37,644 INFO L93 Difference]: Finished difference Result 1792 states and 1980 transitions. [2021-12-06 18:32:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 390 states. [2021-12-06 18:32:37,644 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 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) Word has length 85 [2021-12-06 18:32:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:37,650 INFO L225 Difference]: With dead ends: 1792 [2021-12-06 18:32:37,650 INFO L226 Difference]: Without dead ends: 1790 [2021-12-06 18:32:37,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 154 SyntacticMatches, 8 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69971 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7431, Invalid=148199, Unknown=0, NotChecked=0, Total=155630 [2021-12-06 18:32:37,660 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1398 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 4158 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 5042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 4158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:37,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 719 Invalid, 5042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 4158 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 18:32:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-12-06 18:32:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 621. [2021-12-06 18:32:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 1.0903225806451613) internal successors, (676), 620 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 676 transitions. [2021-12-06 18:32:37,729 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 676 transitions. Word has length 85 [2021-12-06 18:32:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:37,729 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 676 transitions. [2021-12-06 18:32:37,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 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 18:32:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 676 transitions. [2021-12-06 18:32:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:32:37,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:37,731 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:37,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 18:32:37,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:37,932 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2089883948, now seen corresponding path program 11 times [2021-12-06 18:32:37,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:37,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055944682] [2021-12-06 18:32:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:37,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:38,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055944682] [2021-12-06 18:32:38,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055944682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427802661] [2021-12-06 18:32:38,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:32:38,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:38,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:38,164 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:38,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:32:38,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 18:32:38,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:38,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 18:32:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:38,584 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 18:32:38,622 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:32:38,622 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 18:32:38,630 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:32:38,630 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 18:32:38,639 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:32:38,639 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 18:32:38,648 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:32:38,648 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 18:32:39,093 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:32:39,093 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 37 treesize of output 13 [2021-12-06 18:32:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 146 proven. 161 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:32:39,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:41,863 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 73 treesize of output 67 [2021-12-06 18:33:41,871 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:33:41,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1859 treesize of output 1723 [2021-12-06 18:33:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 146 proven. 161 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:33:43,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427802661] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:43,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:43,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 51 [2021-12-06 18:33:43,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010730977] [2021-12-06 18:33:43,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:43,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:33:43,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:43,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:33:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2315, Unknown=31, NotChecked=0, Total=2550 [2021-12-06 18:33:43,553 INFO L87 Difference]: Start difference. First operand 621 states and 676 transitions. Second operand has 51 states, 51 states have (on average 4.137254901960785) internal successors, (211), 51 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 18:34:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:34:55,685 INFO L93 Difference]: Finished difference Result 943 states and 1015 transitions. [2021-12-06 18:34:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-06 18:34:55,686 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.137254901960785) internal successors, (211), 51 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 91 [2021-12-06 18:34:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:34:55,689 INFO L225 Difference]: With dead ends: 943 [2021-12-06 18:34:55,689 INFO L226 Difference]: Without dead ends: 907 [2021-12-06 18:34:55,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 156 SyntacticMatches, 6 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7353 ImplicationChecksByTransitivity, 133.4s TimeCoverageRelationStatistics Valid=1520, Invalid=22285, Unknown=65, NotChecked=0, Total=23870 [2021-12-06 18:34:55,692 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 335 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 3175 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:34:55,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 1341 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3175 Invalid, 0 Unknown, 149 Unchecked, 1.6s Time] [2021-12-06 18:34:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-12-06 18:34:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 694. [2021-12-06 18:34:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 1.0822510822510822) internal successors, (750), 693 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 750 transitions. [2021-12-06 18:34:55,767 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 750 transitions. Word has length 91 [2021-12-06 18:34:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:34:55,767 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 750 transitions. [2021-12-06 18:34:55,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.137254901960785) internal successors, (211), 51 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 18:34:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 750 transitions. [2021-12-06 18:34:55,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:34:55,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:34:55,769 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:34:55,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 18:34:55,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:55,970 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:34:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:34:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash -692005106, now seen corresponding path program 5 times [2021-12-06 18:34:55,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:34:55,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432450510] [2021-12-06 18:34:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:34:55,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:34:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:34:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:56,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:34:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432450510] [2021-12-06 18:34:56,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432450510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:34:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498356588] [2021-12-06 18:34:56,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:34:56,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:34:56,167 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:34:56,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:34:56,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 18:34:56,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:34:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:34:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:34:56,537 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 18:34:56,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,555 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 29 treesize of output 28 [2021-12-06 18:34:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,582 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 18:34:56,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,587 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 18:34:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,593 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 18:34:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,601 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 18:34:56,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,630 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 18:34:56,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,636 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 18:34:56,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,645 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 18:34:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:56,651 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 18:34:57,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:34:57,287 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-12-06 18:34:57,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-12-06 18:34:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 159 proven. 46 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 18:34:57,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:21,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-12-06 18:40:21,877 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-06 18:40:21,877 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-06 18:40:21,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:40:21,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-06 18:40:21,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887005433] [2021-12-06 18:40:21,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:21,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:40:21,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:21,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:40:21,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1873, Unknown=193, NotChecked=0, Total=2256 [2021-12-06 18:40:21,879 INFO L87 Difference]: Start difference. First operand 694 states and 750 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 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 18:40:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:40:21,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 256.5s TimeCoverageRelationStatistics Valid=190, Invalid=1873, Unknown=193, NotChecked=0, Total=2256 [2021-12-06 18:40:21,880 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 1 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 18:40:21,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:40:21,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:40:22,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:22,082 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1214229 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 18:40:22,090 INFO L158 Benchmark]: Toolchain (without parser) took 762043.49ms. Allocated memory was 104.9MB in the beginning and 826.3MB in the end (delta: 721.4MB). Free memory was 67.6MB in the beginning and 595.2MB in the end (delta: -527.6MB). Peak memory consumption was 196.0MB. Max. memory is 16.1GB. [2021-12-06 18:40:22,090 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory is still 84.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:40:22,091 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.49ms. Allocated memory is still 104.9MB. Free memory was 67.4MB in the beginning and 57.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 18:40:22,092 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.98ms. Allocated memory is still 104.9MB. Free memory was 57.0MB in the beginning and 55.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:40:22,093 INFO L158 Benchmark]: Boogie Preprocessor took 18.30ms. Allocated memory is still 104.9MB. Free memory was 55.3MB in the beginning and 54.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:40:22,094 INFO L158 Benchmark]: RCFGBuilder took 250.79ms. Allocated memory is still 104.9MB. Free memory was 54.0MB in the beginning and 73.7MB in the end (delta: -19.7MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2021-12-06 18:40:22,094 INFO L158 Benchmark]: TraceAbstraction took 761578.64ms. Allocated memory was 104.9MB in the beginning and 826.3MB in the end (delta: 721.4MB). Free memory was 73.2MB in the beginning and 595.2MB in the end (delta: -522.0MB). Peak memory consumption was 201.9MB. Max. memory is 16.1GB. [2021-12-06 18:40:22,100 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory is still 84.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 165.49ms. Allocated memory is still 104.9MB. Free memory was 67.4MB in the beginning and 57.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.98ms. Allocated memory is still 104.9MB. Free memory was 57.0MB in the beginning and 55.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.30ms. Allocated memory is still 104.9MB. Free memory was 55.3MB in the beginning and 54.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 250.79ms. Allocated memory is still 104.9MB. Free memory was 54.0MB in the beginning and 73.7MB in the end (delta: -19.7MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * TraceAbstraction took 761578.64ms. Allocated memory was 104.9MB in the beginning and 826.3MB in the end (delta: 721.4MB). Free memory was 73.2MB in the beginning and 595.2MB in the end (delta: -522.0MB). Peak memory consumption was 201.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1214229 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1214229: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/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 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:40:23,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:40:23,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:40:23,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:40:23,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:40:23,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:40:23,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:40:23,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:40:23,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:40:23,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:40:23,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:40:23,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:40:23,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:40:23,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:40:23,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:40:23,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:40:23,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:40:23,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:40:23,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:40:23,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:40:23,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:40:23,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:40:23,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:40:23,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:40:23,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:40:23,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:40:23,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:40:23,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:40:23,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:40:23,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:40:23,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:40:23,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:40:23,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:40:23,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:40:23,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:40:23,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:40:23,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:40:23,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:40:23,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:40:23,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:40:23,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:40:23,554 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 18:40:23,580 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:40:23,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:40:23,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:40:23,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:40:23,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:40:23,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:40:23,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:40:23,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:40:23,582 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:40:23,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:40:23,583 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:40:23,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:40:23,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:40:23,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:40:23,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:40:23,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:40:23,584 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:40:23,584 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 18:40:23,584 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 18:40:23,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:40:23,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:40:23,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:40:23,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:40:23,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:40:23,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:40:23,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:40:23,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:40:23,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:40:23,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:40:23,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:40:23,587 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 18:40:23,587 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 18:40:23,587 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:40:23,587 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:40:23,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:40:23,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:40:23,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 18:40:23,588 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f [2021-12-06 18:40:23,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:40:23,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:40:23,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:40:23,836 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:40:23,836 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:40:23,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/pr4.c [2021-12-06 18:40:23,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data/f0810ad86/2970b7e396be449fbe2d797bfeec1a01/FLAG7e4169db2 [2021-12-06 18:40:24,256 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:40:24,256 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/sv-benchmarks/c/array-tiling/pr4.c [2021-12-06 18:40:24,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data/f0810ad86/2970b7e396be449fbe2d797bfeec1a01/FLAG7e4169db2 [2021-12-06 18:40:24,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/data/f0810ad86/2970b7e396be449fbe2d797bfeec1a01 [2021-12-06 18:40:24,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:40:24,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:40:24,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:40:24,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:40:24,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:40:24,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611f772f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24, skipping insertion in model container [2021-12-06 18:40:24,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:40:24,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:40:24,413 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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/sv-benchmarks/c/array-tiling/pr4.c[394,407] [2021-12-06 18:40:24,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:40:24,442 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:40:24,456 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_e562bd9d-09d8-4921-bdac-ed35fc7222b7/sv-benchmarks/c/array-tiling/pr4.c[394,407] [2021-12-06 18:40:24,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:40:24,482 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:40:24,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24 WrapperNode [2021-12-06 18:40:24,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:40:24,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:40:24,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:40:24,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:40:24,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,518 INFO L137 Inliner]: procedures = 17, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2021-12-06 18:40:24,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:40:24,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:40:24,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:40:24,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:40:24,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:40:24,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:40:24,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:40:24,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:40:24,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (1/1) ... [2021-12-06 18:40:24,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:40:24,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:24,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:40:24,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:40:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:40:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 18:40:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:40:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 18:40:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:40:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:40:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 18:40:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:40:24,682 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:40:24,684 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:40:24,891 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:40:24,897 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:40:24,897 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:40:24,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:40:24 BoogieIcfgContainer [2021-12-06 18:40:24,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:40:24,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:40:24,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:40:24,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:40:24,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:40:24" (1/3) ... [2021-12-06 18:40:24,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b36f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:40:24, skipping insertion in model container [2021-12-06 18:40:24,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:40:24" (2/3) ... [2021-12-06 18:40:24,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b36f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:40:24, skipping insertion in model container [2021-12-06 18:40:24,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:40:24" (3/3) ... [2021-12-06 18:40:24,907 INFO L111 eAbstractionObserver]: Analyzing ICFG pr4.c [2021-12-06 18:40:24,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:40:24,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:40:24,951 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:40:24,957 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 18:40:24,957 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:40:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 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 18:40:24,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:40:24,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:24,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:24,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -260661418, now seen corresponding path program 1 times [2021-12-06 18:40:24,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:24,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525855245] [2021-12-06 18:40:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:24,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:24,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:24,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:24,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 18:40:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:25,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 18:40:25,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:25,104 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 18:40:25,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:40:25,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525855245] [2021-12-06 18:40:25,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525855245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:40:25,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:40:25,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:40:25,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051371783] [2021-12-06 18:40:25,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:40:25,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:40:25,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:40:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:40:25,136 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:25,149 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2021-12-06 18:40:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:40:25,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:40:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:25,158 INFO L225 Difference]: With dead ends: 47 [2021-12-06 18:40:25,158 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 18:40:25,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 18:40:25,163 INFO L933 BasicCegarLoop]: 34 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, 34 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 18:40:25,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:40:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 18:40:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-06 18:40:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-12-06 18:40:25,188 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2021-12-06 18:40:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:25,188 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-06 18:40:25,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-12-06 18:40:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:40:25,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:25,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:25,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:40:25,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:25,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:25,394 INFO L85 PathProgramCache]: Analyzing trace with hash 451593979, now seen corresponding path program 1 times [2021-12-06 18:40:25,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:25,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12068638] [2021-12-06 18:40:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:25,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:25,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:25,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:25,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 18:40:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:40:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:25,643 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 18:40:25,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:40:25,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:25,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12068638] [2021-12-06 18:40:25,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12068638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:40:25,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:40:25,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:40:25,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645743887] [2021-12-06 18:40:25,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:40:25,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:40:25,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:25,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:40:25,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:40:25,647 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:25,777 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-12-06 18:40:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:40:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:40:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:25,779 INFO L225 Difference]: With dead ends: 36 [2021-12-06 18:40:25,779 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 18:40:25,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:40:25,781 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:25,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 21 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:40:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 18:40:25,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-12-06 18:40:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-12-06 18:40:25,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2021-12-06 18:40:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:25,788 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-12-06 18:40:25,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-12-06 18:40:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:40:25,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:25,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:25,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 18:40:25,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:25,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:25,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:25,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1654603184, now seen corresponding path program 1 times [2021-12-06 18:40:25,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:25,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772781053] [2021-12-06 18:40:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:25,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:25,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:26,001 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:26,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 18:40:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:26,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:40:26,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:40:26,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:40:26,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:26,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772781053] [2021-12-06 18:40:26,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772781053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:40:26,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:40:26,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:40:26,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271946613] [2021-12-06 18:40:26,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:40:26,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:40:26,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:26,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:40:26,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:40:26,241 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:26,270 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-12-06 18:40:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:40:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:40:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:26,271 INFO L225 Difference]: With dead ends: 32 [2021-12-06 18:40:26,271 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 18:40:26,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:40:26,272 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:26,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:40:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 18:40:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-06 18:40:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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 18:40:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-06 18:40:26,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2021-12-06 18:40:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:26,277 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-06 18:40:26,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-06 18:40:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:40:26,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:26,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:26,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 18:40:26,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:26,479 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1654662766, now seen corresponding path program 1 times [2021-12-06 18:40:26,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:26,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8259691] [2021-12-06 18:40:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:26,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:26,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:26,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 18:40:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:26,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:40:26,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:26,729 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 18:40:26,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:26,792 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 29 treesize of output 28 [2021-12-06 18:40:26,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:26,824 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 29 treesize of output 28 [2021-12-06 18:40:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:26,873 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 21 treesize of output 20 [2021-12-06 18:40:26,966 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 29 treesize of output 17 [2021-12-06 18:40:26,995 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 18:40:26,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:27,369 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 63 treesize of output 59 [2021-12-06 18:40:27,376 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 703 treesize of output 695 [2021-12-06 18:40:28,028 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 18:40:28,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:28,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8259691] [2021-12-06 18:40:28,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8259691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:28,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:28,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-12-06 18:40:28,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168641093] [2021-12-06 18:40:28,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:28,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:40:28,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:40:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:40:28,031 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:28,960 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2021-12-06 18:40:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:40:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:40:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:28,963 INFO L225 Difference]: With dead ends: 107 [2021-12-06 18:40:28,963 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 18:40:28,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:40:28,965 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 169 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:28,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 96 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 190 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2021-12-06 18:40:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 18:40:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 40. [2021-12-06 18:40:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 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 18:40:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-12-06 18:40:28,975 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 19 [2021-12-06 18:40:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:28,975 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-12-06 18:40:28,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-12-06 18:40:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:40:28,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:28,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:28,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 18:40:29,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:29,179 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1912828204, now seen corresponding path program 1 times [2021-12-06 18:40:29,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:29,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099237775] [2021-12-06 18:40:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:29,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:29,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:29,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:29,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 18:40:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:29,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:40:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:29,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:40:29,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:29,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099237775] [2021-12-06 18:40:29,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099237775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:40:29,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:40:29,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:40:29,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596986555] [2021-12-06 18:40:29,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:40:29,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:40:29,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:40:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:40:29,331 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:29,425 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2021-12-06 18:40:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:40:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:40:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:29,427 INFO L225 Difference]: With dead ends: 111 [2021-12-06 18:40:29,427 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 18:40:29,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:40:29,428 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:29,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 81 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:40:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 18:40:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2021-12-06 18:40:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-12-06 18:40:29,434 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 19 [2021-12-06 18:40:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:29,434 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-12-06 18:40:29,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-12-06 18:40:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:40:29,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:29,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:29,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 18:40:29,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:29,637 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1519801194, now seen corresponding path program 1 times [2021-12-06 18:40:29,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:29,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429442569] [2021-12-06 18:40:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:29,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:29,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:29,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 18:40:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:29,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:40:29,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:29,759 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 18:40:29,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:29,785 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 29 treesize of output 28 [2021-12-06 18:40:29,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:29,800 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 29 treesize of output 28 [2021-12-06 18:40:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:29,814 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 21 treesize of output 20 [2021-12-06 18:40:29,867 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 18:40:29,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:30,029 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 13 [2021-12-06 18:40:30,031 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 24 treesize of output 22 [2021-12-06 18:40:30,049 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 18:40:30,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:30,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429442569] [2021-12-06 18:40:30,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429442569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:30,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:30,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-12-06 18:40:30,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014861702] [2021-12-06 18:40:30,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:30,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:40:30,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:30,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:40:30,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:40:30,051 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:30,606 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2021-12-06 18:40:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:40:30,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:40:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:30,608 INFO L225 Difference]: With dead ends: 125 [2021-12-06 18:40:30,608 INFO L226 Difference]: Without dead ends: 123 [2021-12-06 18:40:30,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:40:30,609 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:30,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 135 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:40:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-06 18:40:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2021-12-06 18:40:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2021-12-06 18:40:30,620 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 19 [2021-12-06 18:40:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:30,620 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2021-12-06 18:40:30,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2021-12-06 18:40:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:30,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:30,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:30,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 18:40:30,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:30,824 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2022900031, now seen corresponding path program 1 times [2021-12-06 18:40:30,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:30,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201044967] [2021-12-06 18:40:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:30,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:30,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:30,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:30,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 18:40:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:30,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:40:30,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:31,026 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 18:40:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:31,064 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 29 treesize of output 28 [2021-12-06 18:40:31,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:31,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:40:31,270 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 29 treesize of output 17 [2021-12-06 18:40:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:31,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:31,612 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 33 treesize of output 31 [2021-12-06 18:40:31,616 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 856 treesize of output 840 [2021-12-06 18:40:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:32,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201044967] [2021-12-06 18:40:32,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201044967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:32,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:32,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-06 18:40:32,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193053451] [2021-12-06 18:40:32,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:32,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:40:32,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:40:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:40:32,017 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 18:40:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:32,863 INFO L93 Difference]: Finished difference Result 128 states and 166 transitions. [2021-12-06 18:40:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:40:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 25 [2021-12-06 18:40:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:32,864 INFO L225 Difference]: With dead ends: 128 [2021-12-06 18:40:32,864 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 18:40:32,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:40:32,866 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 133 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:32,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 80 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 147 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-12-06 18:40:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 18:40:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2021-12-06 18:40:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3333333333333333) internal successors, (100), 75 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2021-12-06 18:40:32,872 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 25 [2021-12-06 18:40:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:32,872 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2021-12-06 18:40:32,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 18:40:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2021-12-06 18:40:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:32,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:32,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:32,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 18:40:33,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:33,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash -743036353, now seen corresponding path program 1 times [2021-12-06 18:40:33,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:33,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371972829] [2021-12-06 18:40:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:33,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:33,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:33,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:33,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 18:40:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:33,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:40:33,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:33,237 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 18:40:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:33,274 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 29 treesize of output 28 [2021-12-06 18:40:33,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:33,306 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 18:40:33,411 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 29 treesize of output 17 [2021-12-06 18:40:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:33,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:33,715 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 18:40:33,718 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 88 treesize of output 84 [2021-12-06 18:40:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:34,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371972829] [2021-12-06 18:40:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371972829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:34,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:34,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-12-06 18:40:34,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869617767] [2021-12-06 18:40:34,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:34,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:40:34,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:40:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:40:34,105 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 18:40:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:35,878 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2021-12-06 18:40:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:40:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 25 [2021-12-06 18:40:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:35,880 INFO L225 Difference]: With dead ends: 147 [2021-12-06 18:40:35,880 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 18:40:35,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:40:35,881 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:35,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 107 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 228 Invalid, 0 Unknown, 84 Unchecked, 0.6s Time] [2021-12-06 18:40:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 18:40:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 84. [2021-12-06 18:40:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.3493975903614457) internal successors, (112), 83 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 18:40:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2021-12-06 18:40:35,890 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 25 [2021-12-06 18:40:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:35,891 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2021-12-06 18:40:35,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 18:40:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2021-12-06 18:40:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:35,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:35,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:35,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 18:40:36,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:36,094 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:36,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:36,095 INFO L85 PathProgramCache]: Analyzing trace with hash -441111327, now seen corresponding path program 1 times [2021-12-06 18:40:36,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:36,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995759527] [2021-12-06 18:40:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:36,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:36,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:36,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:36,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 18:40:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:36,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:40:36,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:36,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:40:36,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995759527] [2021-12-06 18:40:36,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995759527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:40:36,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:40:36,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:40:36,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699343402] [2021-12-06 18:40:36,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:40:36,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:40:36,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:40:36,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:40:36,190 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:36,237 INFO L93 Difference]: Finished difference Result 183 states and 246 transitions. [2021-12-06 18:40:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:40:36,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 18:40:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:36,238 INFO L225 Difference]: With dead ends: 183 [2021-12-06 18:40:36,238 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 18:40:36,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 18:40:36,239 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:36,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 53 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:40:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 18:40:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2021-12-06 18:40:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.3478260869565217) internal successors, (155), 115 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 18:40:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2021-12-06 18:40:36,246 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 25 [2021-12-06 18:40:36,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:36,247 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2021-12-06 18:40:36,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2021-12-06 18:40:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:36,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:36,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:36,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 18:40:36,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:36,449 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1121169697, now seen corresponding path program 1 times [2021-12-06 18:40:36,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:36,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561360635] [2021-12-06 18:40:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:36,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:36,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:36,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:36,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 18:40:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:36,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:40:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:36,594 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 18:40:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:36,623 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 29 treesize of output 28 [2021-12-06 18:40:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:36,641 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 29 treesize of output 28 [2021-12-06 18:40:36,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:36,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:40:36,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:36,711 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 24 treesize of output 23 [2021-12-06 18:40:36,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:36,722 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 24 treesize of output 23 [2021-12-06 18:40:36,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:36,733 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 24 treesize of output 23 [2021-12-06 18:40:36,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:36,745 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 21 treesize of output 20 [2021-12-06 18:40:36,797 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 29 treesize of output 17 [2021-12-06 18:40:36,815 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 18:40:36,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:37,436 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 61 treesize of output 57 [2021-12-06 18:40:37,440 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 2859 treesize of output 2827 [2021-12-06 18:40:42,205 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 18:40:42,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561360635] [2021-12-06 18:40:42,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561360635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:42,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:42,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-12-06 18:40:42,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937687271] [2021-12-06 18:40:42,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:42,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:40:42,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:40:42,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:40:42,207 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 18:40:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:42,841 INFO L93 Difference]: Finished difference Result 198 states and 257 transitions. [2021-12-06 18:40:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:40:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 25 [2021-12-06 18:40:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:42,843 INFO L225 Difference]: With dead ends: 198 [2021-12-06 18:40:42,843 INFO L226 Difference]: Without dead ends: 167 [2021-12-06 18:40:42,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-12-06 18:40:42,844 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:42,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 102 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 170 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2021-12-06 18:40:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-06 18:40:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 125. [2021-12-06 18:40:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.346774193548387) internal successors, (167), 124 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 167 transitions. [2021-12-06 18:40:42,855 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 167 transitions. Word has length 25 [2021-12-06 18:40:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:42,855 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 167 transitions. [2021-12-06 18:40:42,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 18:40:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 167 transitions. [2021-12-06 18:40:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:42,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:42,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:42,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 18:40:43,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:43,058 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1552923937, now seen corresponding path program 1 times [2021-12-06 18:40:43,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:43,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553780737] [2021-12-06 18:40:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:43,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:43,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:43,064 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:43,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 18:40:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:40:43,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:43,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:40:43,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:43,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553780737] [2021-12-06 18:40:43,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553780737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:40:43,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:40:43,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:40:43,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792455916] [2021-12-06 18:40:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:40:43,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:40:43,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:40:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:40:43,148 INFO L87 Difference]: Start difference. First operand 125 states and 167 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:43,194 INFO L93 Difference]: Finished difference Result 195 states and 257 transitions. [2021-12-06 18:40:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:40:43,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 18:40:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:43,196 INFO L225 Difference]: With dead ends: 195 [2021-12-06 18:40:43,196 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 18:40:43,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 18:40:43,197 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:43,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:40:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 18:40:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 125. [2021-12-06 18:40:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3306451612903225) internal successors, (165), 124 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 165 transitions. [2021-12-06 18:40:43,203 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 165 transitions. Word has length 25 [2021-12-06 18:40:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:43,203 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 165 transitions. [2021-12-06 18:40:43,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 165 transitions. [2021-12-06 18:40:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:43,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:43,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:43,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-06 18:40:43,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:43,405 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:43,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1159896927, now seen corresponding path program 1 times [2021-12-06 18:40:43,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:43,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214135364] [2021-12-06 18:40:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:43,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:43,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:43,410 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:43,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 18:40:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:40:43,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:43,530 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 18:40:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:43,559 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 29 treesize of output 28 [2021-12-06 18:40:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:43,571 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 29 treesize of output 28 [2021-12-06 18:40:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:43,598 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 29 treesize of output 28 [2021-12-06 18:40:43,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:43,649 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 29 treesize of output 28 [2021-12-06 18:40:43,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:43,662 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 29 treesize of output 28 [2021-12-06 18:40:43,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:43,677 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 29 treesize of output 28 [2021-12-06 18:40:43,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:43,691 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 21 treesize of output 20 [2021-12-06 18:40:43,752 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 29 treesize of output 17 [2021-12-06 18:40:43,768 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 18:40:43,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:44,381 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 18:40:44,384 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 1430 treesize of output 1414 [2021-12-06 18:40:45,370 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 18:40:45,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214135364] [2021-12-06 18:40:45,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214135364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:45,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:45,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-12-06 18:40:45,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21731041] [2021-12-06 18:40:45,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:45,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:40:45,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:40:45,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:40:45,372 INFO L87 Difference]: Start difference. First operand 125 states and 165 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 18:40:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:46,301 INFO L93 Difference]: Finished difference Result 290 states and 368 transitions. [2021-12-06 18:40:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:40:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 25 [2021-12-06 18:40:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:46,302 INFO L225 Difference]: With dead ends: 290 [2021-12-06 18:40:46,302 INFO L226 Difference]: Without dead ends: 280 [2021-12-06 18:40:46,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:40:46,304 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 101 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:46,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 182 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 273 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2021-12-06 18:40:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-06 18:40:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2021-12-06 18:40:46,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3795180722891567) internal successors, (229), 166 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 229 transitions. [2021-12-06 18:40:46,312 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 229 transitions. Word has length 25 [2021-12-06 18:40:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:46,313 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 229 transitions. [2021-12-06 18:40:46,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 18:40:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 229 transitions. [2021-12-06 18:40:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:46,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:46,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:46,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 18:40:46,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:46,515 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash -743145795, now seen corresponding path program 1 times [2021-12-06 18:40:46,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:46,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906009603] [2021-12-06 18:40:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:46,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:46,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:46,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 18:40:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:40:46,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:46,646 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 18:40:46,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:46,677 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 29 treesize of output 28 [2021-12-06 18:40:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:46,710 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 29 treesize of output 28 [2021-12-06 18:40:46,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:46,725 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 21 treesize of output 20 [2021-12-06 18:40:46,789 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 29 treesize of output 17 [2021-12-06 18:40:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:40:46,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:47,043 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 23 treesize of output 21 [2021-12-06 18:40:47,045 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 74 treesize of output 72 [2021-12-06 18:40:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:40:47,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:47,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906009603] [2021-12-06 18:40:47,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906009603] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:47,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:47,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-12-06 18:40:47,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280112712] [2021-12-06 18:40:47,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:47,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:40:47,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:40:47,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:40:47,133 INFO L87 Difference]: Start difference. First operand 167 states and 229 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:47,511 INFO L93 Difference]: Finished difference Result 190 states and 256 transitions. [2021-12-06 18:40:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:40:47,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 18:40:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:47,513 INFO L225 Difference]: With dead ends: 190 [2021-12-06 18:40:47,513 INFO L226 Difference]: Without dead ends: 180 [2021-12-06 18:40:47,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:40:47,514 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:47,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 81 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-12-06 18:40:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-06 18:40:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2021-12-06 18:40:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.3742690058479532) internal successors, (235), 171 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 235 transitions. [2021-12-06 18:40:47,527 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 235 transitions. Word has length 25 [2021-12-06 18:40:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:47,527 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 235 transitions. [2021-12-06 18:40:47,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 235 transitions. [2021-12-06 18:40:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:47,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:47,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:47,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-06 18:40:47,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:47,729 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1136172805, now seen corresponding path program 1 times [2021-12-06 18:40:47,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:47,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676432649] [2021-12-06 18:40:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:47,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:47,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:47,732 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:47,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 18:40:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:40:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:47,875 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 18:40:47,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:47,907 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 29 treesize of output 28 [2021-12-06 18:40:47,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:47,918 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 18:40:48,038 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 29 treesize of output 17 [2021-12-06 18:40:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:48,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:48,309 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 17 treesize of output 15 [2021-12-06 18:40:48,311 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 34 treesize of output 30 [2021-12-06 18:40:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:48,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:48,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676432649] [2021-12-06 18:40:48,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676432649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:48,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:48,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-06 18:40:48,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894844262] [2021-12-06 18:40:48,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:48,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:40:48,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:48,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:40:48,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:40:48,438 INFO L87 Difference]: Start difference. First operand 172 states and 235 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 18:40:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:49,660 INFO L93 Difference]: Finished difference Result 294 states and 373 transitions. [2021-12-06 18:40:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:40:49,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 25 [2021-12-06 18:40:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:49,662 INFO L225 Difference]: With dead ends: 294 [2021-12-06 18:40:49,663 INFO L226 Difference]: Without dead ends: 284 [2021-12-06 18:40:49,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:40:49,663 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 165 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:49,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 162 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 283 Invalid, 0 Unknown, 59 Unchecked, 0.8s Time] [2021-12-06 18:40:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-06 18:40:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 199. [2021-12-06 18:40:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3636363636363635) internal successors, (270), 198 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 270 transitions. [2021-12-06 18:40:49,672 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 270 transitions. Word has length 25 [2021-12-06 18:40:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:49,673 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 270 transitions. [2021-12-06 18:40:49,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 18:40:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 270 transitions. [2021-12-06 18:40:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:40:49,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:49,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:49,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 18:40:49,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:49,874 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1963473599, now seen corresponding path program 1 times [2021-12-06 18:40:49,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:49,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745066055] [2021-12-06 18:40:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:49,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:49,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:49,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:49,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 18:40:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:40:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:49,947 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 18:40:49,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:49,974 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 29 treesize of output 28 [2021-12-06 18:40:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:49,984 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 18:40:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:50,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:50,267 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 17 treesize of output 15 [2021-12-06 18:40:50,269 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 30 treesize of output 26 [2021-12-06 18:40:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:50,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745066055] [2021-12-06 18:40:50,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745066055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:50,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:50,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-12-06 18:40:50,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673323732] [2021-12-06 18:40:50,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:50,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:40:50,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:50,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:40:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:40:50,290 INFO L87 Difference]: Start difference. First operand 199 states and 270 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 18:40:51,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:51,042 INFO L93 Difference]: Finished difference Result 290 states and 376 transitions. [2021-12-06 18:40:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:40:51,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 18:40:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:51,044 INFO L225 Difference]: With dead ends: 290 [2021-12-06 18:40:51,044 INFO L226 Difference]: Without dead ends: 288 [2021-12-06 18:40:51,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 18:40:51,045 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 163 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:51,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 110 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:40:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-06 18:40:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 206. [2021-12-06 18:40:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3560975609756099) internal successors, (278), 205 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 278 transitions. [2021-12-06 18:40:51,060 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 278 transitions. Word has length 25 [2021-12-06 18:40:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 278 transitions. [2021-12-06 18:40:51,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 18:40:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 278 transitions. [2021-12-06 18:40:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:40:51,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:51,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:51,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 18:40:51,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:51,263 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1272777940, now seen corresponding path program 2 times [2021-12-06 18:40:51,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:51,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215219736] [2021-12-06 18:40:51,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:40:51,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:51,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:51,270 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:51,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 18:40:51,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:40:51,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:40:51,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:40:51,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:51,448 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 18:40:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:51,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:40:51,672 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 29 treesize of output 17 [2021-12-06 18:40:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:51,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:51,940 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 18:40:51,943 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 200 treesize of output 192 [2021-12-06 18:40:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:52,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:52,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215219736] [2021-12-06 18:40:52,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215219736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:52,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:52,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-12-06 18:40:52,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575736680] [2021-12-06 18:40:52,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:52,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:40:52,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:52,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:40:52,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:40:52,079 INFO L87 Difference]: Start difference. First operand 206 states and 278 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 18:40:55,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:40:55,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:55,757 INFO L93 Difference]: Finished difference Result 289 states and 368 transitions. [2021-12-06 18:40:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:40:55,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 31 [2021-12-06 18:40:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:55,759 INFO L225 Difference]: With dead ends: 289 [2021-12-06 18:40:55,759 INFO L226 Difference]: Without dead ends: 279 [2021-12-06 18:40:55,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=346, Invalid=1546, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:40:55,760 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:55,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 105 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 274 Invalid, 1 Unknown, 54 Unchecked, 2.7s Time] [2021-12-06 18:40:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-06 18:40:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 215. [2021-12-06 18:40:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.3457943925233644) internal successors, (288), 214 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 18:40:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 288 transitions. [2021-12-06 18:40:55,770 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 288 transitions. Word has length 31 [2021-12-06 18:40:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:55,771 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 288 transitions. [2021-12-06 18:40:55,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 18:40:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 288 transitions. [2021-12-06 18:40:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:40:55,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:55,771 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:55,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 18:40:55,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:55,973 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:55,974 INFO L85 PathProgramCache]: Analyzing trace with hash -45637618, now seen corresponding path program 1 times [2021-12-06 18:40:55,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:55,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354637049] [2021-12-06 18:40:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:55,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:55,978 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:55,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 18:40:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:40:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:40:56,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:40:56,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354637049] [2021-12-06 18:40:56,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354637049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:40:56,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:40:56,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:40:56,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379489773] [2021-12-06 18:40:56,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:40:56,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:40:56,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:56,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:40:56,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:40:56,106 INFO L87 Difference]: Start difference. First operand 215 states and 288 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:56,153 INFO L93 Difference]: Finished difference Result 275 states and 358 transitions. [2021-12-06 18:40:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:40:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:40:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:56,155 INFO L225 Difference]: With dead ends: 275 [2021-12-06 18:40:56,155 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 18:40:56,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 18:40:56,156 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:56,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:40:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 18:40:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-12-06 18:40:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 169 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 217 transitions. [2021-12-06 18:40:56,164 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 217 transitions. Word has length 31 [2021-12-06 18:40:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:56,165 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 217 transitions. [2021-12-06 18:40:56,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 217 transitions. [2021-12-06 18:40:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:40:56,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:56,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:56,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 18:40:56,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:40:56,366 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1491632658, now seen corresponding path program 1 times [2021-12-06 18:40:56,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:40:56,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035549435] [2021-12-06 18:40:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:56,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:40:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:40:56,367 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:40:56,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 18:40:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:56,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 18:40:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:56,449 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 18:40:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:40:56,469 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 18:40:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:56,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:56,783 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 17 treesize of output 15 [2021-12-06 18:40:56,784 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 30 treesize of output 26 [2021-12-06 18:40:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:56,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:40:56,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035549435] [2021-12-06 18:40:56,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035549435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:56,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:40:56,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-12-06 18:40:56,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151698177] [2021-12-06 18:40:56,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:56,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:40:56,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:40:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:40:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:40:56,810 INFO L87 Difference]: Start difference. First operand 170 states and 217 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:00,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:41:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:00,290 INFO L93 Difference]: Finished difference Result 363 states and 444 transitions. [2021-12-06 18:41:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:41:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:41:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:00,292 INFO L225 Difference]: With dead ends: 363 [2021-12-06 18:41:00,292 INFO L226 Difference]: Without dead ends: 361 [2021-12-06 18:41:00,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=445, Invalid=1907, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:41:00,294 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 218 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 169 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:00,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 157 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 540 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 18:41:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-12-06 18:41:00,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 201. [2021-12-06 18:41:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.27) internal successors, (254), 200 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 254 transitions. [2021-12-06 18:41:00,314 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 254 transitions. Word has length 31 [2021-12-06 18:41:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:00,314 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 254 transitions. [2021-12-06 18:41:00,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 254 transitions. [2021-12-06 18:41:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:41:00,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:00,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:00,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 18:41:00,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:41:00,516 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1514601204, now seen corresponding path program 1 times [2021-12-06 18:41:00,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:41:00,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198555871] [2021-12-06 18:41:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:00,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:41:00,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:41:00,521 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:41:00,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 18:41:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:41:00,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:41:00,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:00,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:41:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198555871] [2021-12-06 18:41:00,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198555871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:00,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:00,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:41:00,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126522567] [2021-12-06 18:41:00,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:00,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:41:00,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:41:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:41:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:41:00,601 INFO L87 Difference]: Start difference. First operand 201 states and 254 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:00,653 INFO L93 Difference]: Finished difference Result 241 states and 300 transitions. [2021-12-06 18:41:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:41:00,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:41:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:00,654 INFO L225 Difference]: With dead ends: 241 [2021-12-06 18:41:00,654 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 18:41:00,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 18:41:00,655 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:00,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 18:41:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-12-06 18:41:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2444444444444445) internal successors, (224), 180 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 18:41:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 224 transitions. [2021-12-06 18:41:00,665 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 224 transitions. Word has length 31 [2021-12-06 18:41:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:00,666 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 224 transitions. [2021-12-06 18:41:00,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 224 transitions. [2021-12-06 18:41:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:41:00,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:00,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:00,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 18:41:00,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:41:00,867 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -830647440, now seen corresponding path program 1 times [2021-12-06 18:41:00,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:41:00,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661939659] [2021-12-06 18:41:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:00,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:41:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:41:00,872 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:41:00,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 18:41:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:00,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:41:00,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:41:00,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:00,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:41:00,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661939659] [2021-12-06 18:41:00,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661939659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:00,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:00,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:41:00,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100303390] [2021-12-06 18:41:00,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:00,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:41:00,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:41:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:41:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:41:00,991 INFO L87 Difference]: Start difference. First operand 181 states and 224 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:01,042 INFO L93 Difference]: Finished difference Result 213 states and 260 transitions. [2021-12-06 18:41:01,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:41:01,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:41:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:01,044 INFO L225 Difference]: With dead ends: 213 [2021-12-06 18:41:01,044 INFO L226 Difference]: Without dead ends: 174 [2021-12-06 18:41:01,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 18:41:01,044 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:01,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 55 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-06 18:41:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 158. [2021-12-06 18:41:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.2292993630573248) internal successors, (193), 157 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 193 transitions. [2021-12-06 18:41:01,059 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 193 transitions. Word has length 31 [2021-12-06 18:41:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:01,059 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 193 transitions. [2021-12-06 18:41:01,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 193 transitions. [2021-12-06 18:41:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:41:01,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:01,060 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:01,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-06 18:41:01,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:41:01,261 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:01,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2136932185, now seen corresponding path program 3 times [2021-12-06 18:41:01,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:41:01,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947831270] [2021-12-06 18:41:01,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:41:01,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:41:01,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:41:01,267 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:41:01,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 18:41:01,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 18:41:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:41:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 18:41:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:01,407 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 18:41:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:01,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:01,800 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 17 treesize of output 15 [2021-12-06 18:41:01,802 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 30 treesize of output 26 [2021-12-06 18:41:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:01,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:41:01,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947831270] [2021-12-06 18:41:01,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947831270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:01,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:41:01,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-12-06 18:41:01,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117676536] [2021-12-06 18:41:01,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:01,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:41:01,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:41:01,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:41:01,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:41:01,831 INFO L87 Difference]: Start difference. First operand 158 states and 193 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 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 18:41:05,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:41:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:06,042 INFO L93 Difference]: Finished difference Result 468 states and 543 transitions. [2021-12-06 18:41:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 18:41:06,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 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) Word has length 37 [2021-12-06 18:41:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:06,044 INFO L225 Difference]: With dead ends: 468 [2021-12-06 18:41:06,044 INFO L226 Difference]: Without dead ends: 466 [2021-12-06 18:41:06,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=781, Invalid=3911, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:41:06,046 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 287 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 180 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:06,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 211 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1028 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 18:41:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-06 18:41:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 254. [2021-12-06 18:41:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.2213438735177866) internal successors, (309), 253 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 309 transitions. [2021-12-06 18:41:06,063 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 309 transitions. Word has length 37 [2021-12-06 18:41:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:06,063 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 309 transitions. [2021-12-06 18:41:06,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 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 18:41:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 309 transitions. [2021-12-06 18:41:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:41:06,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:06,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:06,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 18:41:06,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:41:06,265 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:06,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2129190839, now seen corresponding path program 4 times [2021-12-06 18:41:06,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:41:06,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948701133] [2021-12-06 18:41:06,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:41:06,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:41:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:41:06,270 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:41:06,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 18:41:06,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:41:06,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:41:06,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:41:06,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:06,479 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 16 treesize of output 12 [2021-12-06 18:41:06,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:06,516 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 29 treesize of output 28 [2021-12-06 18:41:06,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:06,572 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 18:41:06,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:06,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:41:06,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:06,611 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 18:41:06,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:06,639 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 18:41:06,855 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 29 treesize of output 17 [2021-12-06 18:41:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:06,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:08,451 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 33 treesize of output 31 [2021-12-06 18:41:08,455 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 856 treesize of output 840 [2021-12-06 18:41:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:08,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:41:08,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948701133] [2021-12-06 18:41:08,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948701133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:08,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:41:08,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-12-06 18:41:08,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106059711] [2021-12-06 18:41:08,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:08,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:41:08,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:41:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:41:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:41:08,780 INFO L87 Difference]: Start difference. First operand 254 states and 309 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 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 18:41:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:12,124 INFO L93 Difference]: Finished difference Result 406 states and 474 transitions. [2021-12-06 18:41:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:41:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 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 37 [2021-12-06 18:41:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:12,126 INFO L225 Difference]: With dead ends: 406 [2021-12-06 18:41:12,126 INFO L226 Difference]: Without dead ends: 390 [2021-12-06 18:41:12,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=475, Invalid=2717, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 18:41:12,128 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 140 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:12,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 242 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 559 Invalid, 0 Unknown, 214 Unchecked, 1.0s Time] [2021-12-06 18:41:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-06 18:41:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 272. [2021-12-06 18:41:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.2177121771217712) internal successors, (330), 271 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 330 transitions. [2021-12-06 18:41:12,147 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 330 transitions. Word has length 37 [2021-12-06 18:41:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:12,147 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 330 transitions. [2021-12-06 18:41:12,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 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 18:41:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 330 transitions. [2021-12-06 18:41:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:41:12,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:12,148 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:12,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 18:41:12,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:41:12,349 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:12,350 INFO L85 PathProgramCache]: Analyzing trace with hash 234807077, now seen corresponding path program 2 times [2021-12-06 18:41:12,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:41:12,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558497032] [2021-12-06 18:41:12,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:41:12,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:41:12,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:41:12,354 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:41:12,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 18:41:12,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:41:12,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:41:12,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:41:12,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:12,576 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 18:41:12,815 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 29 treesize of output 17 [2021-12-06 18:41:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:12,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:13,061 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 17 treesize of output 15 [2021-12-06 18:41:13,064 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 34 treesize of output 30 [2021-12-06 18:41:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:13,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:41:13,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558497032] [2021-12-06 18:41:13,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558497032] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:13,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:41:13,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-12-06 18:41:13,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147811766] [2021-12-06 18:41:13,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:13,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:41:13,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:41:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:41:13,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:41:13,233 INFO L87 Difference]: Start difference. First operand 272 states and 330 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 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 18:41:18,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:41:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:18,679 INFO L93 Difference]: Finished difference Result 562 states and 649 transitions. [2021-12-06 18:41:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:41:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 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 37 [2021-12-06 18:41:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:18,681 INFO L225 Difference]: With dead ends: 562 [2021-12-06 18:41:18,681 INFO L226 Difference]: Without dead ends: 488 [2021-12-06 18:41:18,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=631, Invalid=3151, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 18:41:18,683 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 244 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 159 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:18,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 319 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 796 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-12-06 18:41:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-12-06 18:41:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 270. [2021-12-06 18:41:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1858736059479553) internal successors, (319), 269 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 18:41:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 319 transitions. [2021-12-06 18:41:18,704 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 319 transitions. Word has length 37 [2021-12-06 18:41:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:18,704 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 319 transitions. [2021-12-06 18:41:18,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 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 18:41:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 319 transitions. [2021-12-06 18:41:18,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:41:18,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:18,705 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:18,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 18:41:18,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:41:18,906 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash -899594747, now seen corresponding path program 2 times [2021-12-06 18:41:18,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:41:18,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641157124] [2021-12-06 18:41:18,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:41:18,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:41:18,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:41:18,911 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:41:18,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e562bd9d-09d8-4921-bdac-ed35fc7222b7/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 18:41:18,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:41:18,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:41:18,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 18:41:18,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:19,039 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 16 treesize of output 12 [2021-12-06 18:41:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,062 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 29 treesize of output 28 [2021-12-06 18:41:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,075 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 29 treesize of output 28 [2021-12-06 18:41:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,088 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 29 treesize of output 28 [2021-12-06 18:41:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,140 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 41 treesize of output 31 [2021-12-06 18:41:19,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,177 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 29 treesize of output 28 [2021-12-06 18:41:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,190 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 29 treesize of output 28 [2021-12-06 18:41:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,222 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 29 treesize of output 28 [2021-12-06 18:41:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,270 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 24 treesize of output 23 [2021-12-06 18:41:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,282 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 24 treesize of output 23 [2021-12-06 18:41:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,295 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 24 treesize of output 23 [2021-12-06 18:41:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,306 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 24 treesize of output 23 [2021-12-06 18:41:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,355 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 24 treesize of output 23 [2021-12-06 18:41:19,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,371 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 24 treesize of output 23 [2021-12-06 18:41:19,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,383 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 24 treesize of output 23 [2021-12-06 18:41:19,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:19,396 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 21 treesize of output 20 [2021-12-06 18:41:19,478 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 29 treesize of output 17 [2021-12-06 18:41:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:19,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:21,529 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 46 treesize of output 44 [2021-12-06 18:41:21,535 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 47116 treesize of output 46988