./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:56:17,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:56:17,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:56:17,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:56:17,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:56:17,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:56:17,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:56:17,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:56:17,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:56:17,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:56:17,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:56:17,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:56:17,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:56:17,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:56:17,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:56:17,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:56:17,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:56:17,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:56:17,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:56:17,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:56:17,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:56:17,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:56:17,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:56:17,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:56:17,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:56:17,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:56:17,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:56:17,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:56:17,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:56:17,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:56:17,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:56:17,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:56:17,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:56:17,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:56:17,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:56:17,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:56:17,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:56:17,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:56:17,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:56:17,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:56:17,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:56:17,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:56:17,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:56:17,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:56:17,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:56:17,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:56:17,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:56:17,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:56:17,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:56:17,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:56:17,554 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:56:17,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:56:17,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:56:17,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:56:17,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:56:17,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:56:17,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:56:17,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:56:17,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:56:17,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:56:17,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:56:17,556 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:56:17,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:56:17,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:56:17,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:56:17,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:56:17,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:56:17,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:56:17,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:56:17,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:56:17,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:56:17,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:56:17,557 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:56:17,558 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:56:17,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:56:17,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:56:17,558 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2021-12-17 00:56:17,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:56:17,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:56:17,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:56:17,757 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:56:17,758 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:56:17,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2021-12-17 00:56:17,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8f0f7959/8e55b3e3f6aa4fc99ee3e9fb13e4c73d/FLAGcd721734f [2021-12-17 00:56:18,159 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:56:18,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2021-12-17 00:56:18,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8f0f7959/8e55b3e3f6aa4fc99ee3e9fb13e4c73d/FLAGcd721734f [2021-12-17 00:56:18,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8f0f7959/8e55b3e3f6aa4fc99ee3e9fb13e4c73d [2021-12-17 00:56:18,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:56:18,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:56:18,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:56:18,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:56:18,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:56:18,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d224e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18, skipping insertion in model container [2021-12-17 00:56:18,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:56:18,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:56:18,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2021-12-17 00:56:18,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:56:18,335 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:56:18,343 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2021-12-17 00:56:18,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:56:18,363 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:56:18,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18 WrapperNode [2021-12-17 00:56:18,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:56:18,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:56:18,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:56:18,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:56:18,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,387 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-12-17 00:56:18,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:56:18,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:56:18,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:56:18,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:56:18,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:56:18,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:56:18,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:56:18,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:56:18,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (1/1) ... [2021-12-17 00:56:18,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:56:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:18,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:56:18,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:56:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:56:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:56:18,459 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:56:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:56:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:56:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:56:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:56:18,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:56:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:56:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:56:18,505 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:56:18,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:56:18,572 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:56:18,576 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:56:18,576 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 00:56:18,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:56:18 BoogieIcfgContainer [2021-12-17 00:56:18,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:56:18,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:56:18,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:56:18,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:56:18,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:56:18" (1/3) ... [2021-12-17 00:56:18,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c51d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:56:18, skipping insertion in model container [2021-12-17 00:56:18,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:56:18" (2/3) ... [2021-12-17 00:56:18,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c51d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:56:18, skipping insertion in model container [2021-12-17 00:56:18,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:56:18" (3/3) ... [2021-12-17 00:56:18,583 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2021-12-17 00:56:18,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:56:18,587 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:56:18,614 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:56:18,619 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 [2021-12-17 00:56:18,620 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:56:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:56:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 00:56:18,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:18,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:18,648 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2021-12-17 00:56:18,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:18,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96117137] [2021-12-17 00:56:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:18,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:18,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:56:18,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:18,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96117137] [2021-12-17 00:56:18,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96117137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:56:18,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:56:18,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:56:18,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085390698] [2021-12-17 00:56:18,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:56:18,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:56:18,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:56:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:56:18,856 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:56:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:18,870 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2021-12-17 00:56:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:56:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-17 00:56:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:18,880 INFO L225 Difference]: With dead ends: 47 [2021-12-17 00:56:18,880 INFO L226 Difference]: Without dead ends: 21 [2021-12-17 00:56:18,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:56:18,890 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2021-12-17 00:56:18,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:56:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-17 00:56:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-17 00:56:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:56:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-17 00:56:18,922 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2021-12-17 00:56:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:18,922 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-17 00:56:18,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:56:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-17 00:56:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 00:56:18,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:18,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:18,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:56:18,926 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2021-12-17 00:56:18,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:18,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917993241] [2021-12-17 00:56:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:18,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:19,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:19,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:56:19,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:19,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917993241] [2021-12-17 00:56:19,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917993241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:56:19,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:56:19,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:56:19,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020829072] [2021-12-17 00:56:19,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:56:19,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:56:19,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:56:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:56:19,078 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 00:56:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:19,132 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-17 00:56:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:56:19,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-17 00:56:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:19,134 INFO L225 Difference]: With dead ends: 39 [2021-12-17 00:56:19,134 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 00:56:19,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:56:19,140 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:19,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:56:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 00:56:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-12-17 00:56:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:56:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-17 00:56:19,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-12-17 00:56:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:19,146 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-17 00:56:19,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 00:56:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-17 00:56:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 00:56:19,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:19,148 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:19,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 00:56:19,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2021-12-17 00:56:19,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:19,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173845151] [2021-12-17 00:56:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:19,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:19,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:19,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:56:19,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173845151] [2021-12-17 00:56:19,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173845151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878855031] [2021-12-17 00:56:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:19,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:19,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:19,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:19,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:56:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:19,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 00:56:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:19,587 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 [2021-12-17 00:56:19,648 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 [2021-12-17 00:56:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:56:19,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:19,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:56:19,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:56:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:56:19,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878855031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:19,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:19,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-17 00:56:19,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790579774] [2021-12-17 00:56:19,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:19,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:56:19,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:56:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:56:19,957 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:56:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:20,165 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-12-17 00:56:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 00:56:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 27 [2021-12-17 00:56:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:20,166 INFO L225 Difference]: With dead ends: 48 [2021-12-17 00:56:20,167 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 00:56:20,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-12-17 00:56:20,170 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:20,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 157 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:56:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 00:56:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-12-17 00:56:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 00:56:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-17 00:56:20,184 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2021-12-17 00:56:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:20,185 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-17 00:56:20,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:56:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-17 00:56:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 00:56:20,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:20,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:20,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:20,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:20,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2021-12-17 00:56:20,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:20,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462207483] [2021-12-17 00:56:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:20,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:20,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:20,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462207483] [2021-12-17 00:56:20,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462207483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832740037] [2021-12-17 00:56:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:20,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:20,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:20,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:20,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:56:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:56:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:20,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:20,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832740037] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:20,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:20,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-17 00:56:20,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942373290] [2021-12-17 00:56:20,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:20,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:56:20,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:20,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:56:20,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:56:20,613 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 00:56:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:20,658 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-17 00:56:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 00:56:20,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-12-17 00:56:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:20,659 INFO L225 Difference]: With dead ends: 53 [2021-12-17 00:56:20,659 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 00:56:20,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:56:20,660 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:20,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 75 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:56:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 00:56:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-12-17 00:56:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 00:56:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-17 00:56:20,664 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2021-12-17 00:56:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:20,664 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-17 00:56:20,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 00:56:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-17 00:56:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 00:56:20,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:20,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:20,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:20,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 00:56:20,882 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:20,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2021-12-17 00:56:20,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:20,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936875081] [2021-12-17 00:56:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:20,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:20,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:20,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:21,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:21,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:21,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936875081] [2021-12-17 00:56:21,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936875081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:21,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181918] [2021-12-17 00:56:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:56:21,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:21,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:21,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:21,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:56:21,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:56:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:21,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 00:56:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:21,267 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:56:21,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:56:21,312 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 [2021-12-17 00:56:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:56:21,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:21,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:56:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:56:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:21,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:21,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:21,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-12-17 00:56:21,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044585513] [2021-12-17 00:56:21,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:21,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 00:56:21,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 00:56:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:56:21,580 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 00:56:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:21,760 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-12-17 00:56:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 00:56:21,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2021-12-17 00:56:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:21,762 INFO L225 Difference]: With dead ends: 55 [2021-12-17 00:56:21,762 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 00:56:21,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-12-17 00:56:21,764 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:21,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 149 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 178 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2021-12-17 00:56:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 00:56:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-12-17 00:56:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-12-17 00:56:21,768 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 35 [2021-12-17 00:56:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:21,769 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-12-17 00:56:21,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 00:56:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-12-17 00:56:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 00:56:21,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:21,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:21,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:21,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:21,987 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2021-12-17 00:56:21,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:21,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918010426] [2021-12-17 00:56:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:21,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:22,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:22,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:22,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:22,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:22,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:22,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918010426] [2021-12-17 00:56:22,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918010426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:22,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133529221] [2021-12-17 00:56:22,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:56:22,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:22,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:22,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:22,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:56:22,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:56:22,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:22,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 00:56:22,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:22,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:22,486 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 00:56:22,487 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 25 treesize of output 12 [2021-12-17 00:56:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:22,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:22,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:56:22,704 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 42 treesize of output 36 [2021-12-17 00:56:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:22,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133529221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:22,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:22,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2021-12-17 00:56:22,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284618331] [2021-12-17 00:56:22,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:22,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 00:56:22,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 00:56:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-12-17 00:56:22,973 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:56:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:23,313 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-12-17 00:56:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 00:56:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2021-12-17 00:56:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:23,314 INFO L225 Difference]: With dead ends: 54 [2021-12-17 00:56:23,314 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 00:56:23,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 00:56:23,316 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:23,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 213 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 154 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-12-17 00:56:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 00:56:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-17 00:56:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-17 00:56:23,319 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 39 [2021-12-17 00:56:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:23,319 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-17 00:56:23,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:56:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-17 00:56:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 00:56:23,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:23,320 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:23,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:23,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:23,523 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2021-12-17 00:56:23,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:23,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680726697] [2021-12-17 00:56:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:23,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:23,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:23,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:23,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:23,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:23,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:56:23,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680726697] [2021-12-17 00:56:23,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680726697] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322240560] [2021-12-17 00:56:23,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:56:23,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:23,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:23,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:23,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:56:23,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 00:56:23,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 00:56:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:23,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:24,044 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:24,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:56:24,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-17 00:56:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:24,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:24,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:56:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:56:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:56:24,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322240560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:24,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:24,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2021-12-17 00:56:24,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145709079] [2021-12-17 00:56:24,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:24,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 00:56:24,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:24,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 00:56:24,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:56:24,366 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:56:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:24,573 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-17 00:56:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 00:56:24,574 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2021-12-17 00:56:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:24,574 INFO L225 Difference]: With dead ends: 60 [2021-12-17 00:56:24,574 INFO L226 Difference]: Without dead ends: 58 [2021-12-17 00:56:24,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 00:56:24,575 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:24,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 226 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 235 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2021-12-17 00:56:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-17 00:56:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-12-17 00:56:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-17 00:56:24,580 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 47 [2021-12-17 00:56:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:24,581 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-17 00:56:24,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:56:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-17 00:56:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 00:56:24,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:24,582 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:24,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:24,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:24,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash 513051739, now seen corresponding path program 3 times [2021-12-17 00:56:24,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:24,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408017375] [2021-12-17 00:56:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:24,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:24,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:24,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:24,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:24,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:24,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:24,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:56:24,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:24,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408017375] [2021-12-17 00:56:24,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408017375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:24,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786791031] [2021-12-17 00:56:24,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:56:24,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:24,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:24,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:24,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:56:25,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 00:56:25,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:25,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 00:56:25,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:25,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:25,188 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:56:25,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:56:25,243 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:56:25,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:56:25,310 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:56:25,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:56:25,330 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 [2021-12-17 00:56:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 00:56:25,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:25,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:56:25,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:56:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 00:56:25,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786791031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:25,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:25,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 24 [2021-12-17 00:56:25,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333902438] [2021-12-17 00:56:25,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:25,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 00:56:25,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 00:56:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:56:25,666 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 19 states have internal predecessors, (47), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-17 00:56:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:25,818 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-12-17 00:56:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:56:25,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 19 states have internal predecessors, (47), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 51 [2021-12-17 00:56:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:25,819 INFO L225 Difference]: With dead ends: 60 [2021-12-17 00:56:25,819 INFO L226 Difference]: Without dead ends: 58 [2021-12-17 00:56:25,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 19 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-12-17 00:56:25,820 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:25,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 155 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 192 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-12-17 00:56:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-17 00:56:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-12-17 00:56:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-12-17 00:56:25,824 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 51 [2021-12-17 00:56:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:25,824 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-12-17 00:56:25,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 19 states have internal predecessors, (47), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-17 00:56:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-12-17 00:56:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 00:56:25,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:25,825 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:25,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:26,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:26,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:26,028 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2021-12-17 00:56:26,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:26,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797794393] [2021-12-17 00:56:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:26,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:26,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:26,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:26,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:26,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:26,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:56:26,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797794393] [2021-12-17 00:56:26,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797794393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244049080] [2021-12-17 00:56:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:56:26,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:26,232 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:26,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 00:56:26,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:56:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 00:56:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:26,444 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 [2021-12-17 00:56:26,533 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 [2021-12-17 00:56:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:56:26,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:26,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:56:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:56:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:56:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244049080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:26,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:26,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2021-12-17 00:56:26,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487159451] [2021-12-17 00:56:26,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:26,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 00:56:26,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 00:56:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 00:56:26,909 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 28 states have internal predecessors, (76), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-17 00:56:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:27,576 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-12-17 00:56:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 00:56:27,577 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 28 states have internal predecessors, (76), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 51 [2021-12-17 00:56:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:27,578 INFO L225 Difference]: With dead ends: 86 [2021-12-17 00:56:27,578 INFO L226 Difference]: Without dead ends: 84 [2021-12-17 00:56:27,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=2456, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 00:56:27,579 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 132 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:27,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 347 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:56:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-17 00:56:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-12-17 00:56:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-17 00:56:27,585 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 51 [2021-12-17 00:56:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:27,585 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-17 00:56:27,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 28 states have internal predecessors, (76), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-17 00:56:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-17 00:56:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 00:56:27,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:27,586 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:27,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:27,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:27,802 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2001937361, now seen corresponding path program 5 times [2021-12-17 00:56:27,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:27,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765009519] [2021-12-17 00:56:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:27,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:27,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:27,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:27,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:27,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:28,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:56:28,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:28,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765009519] [2021-12-17 00:56:28,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765009519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:28,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510115710] [2021-12-17 00:56:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:56:28,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:28,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:28,018 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:28,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 00:56:28,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 00:56:28,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 00:56:28,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:28,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:30,379 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:30,380 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 [2021-12-17 00:56:32,559 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:32,560 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 [2021-12-17 00:56:32,626 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 9 [2021-12-17 00:56:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 42 refuted. 4 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:56:32,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:32,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510115710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:32,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:56:32,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 22 [2021-12-17 00:56:32,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297603390] [2021-12-17 00:56:32,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:32,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 00:56:32,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 00:56:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=454, Unknown=2, NotChecked=0, Total=552 [2021-12-17 00:56:32,713 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:56:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:32,923 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-12-17 00:56:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 00:56:32,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 55 [2021-12-17 00:56:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:32,925 INFO L225 Difference]: With dead ends: 68 [2021-12-17 00:56:32,925 INFO L226 Difference]: Without dead ends: 66 [2021-12-17 00:56:32,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=181, Invalid=939, Unknown=2, NotChecked=0, Total=1122 [2021-12-17 00:56:32,925 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:32,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 185 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 244 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2021-12-17 00:56:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-17 00:56:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-12-17 00:56:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-17 00:56:32,935 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 55 [2021-12-17 00:56:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:32,935 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-17 00:56:32,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:56:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-17 00:56:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 00:56:32,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:32,938 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:32,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:33,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 00:56:33,150 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1453174918, now seen corresponding path program 6 times [2021-12-17 00:56:33,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:33,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651272663] [2021-12-17 00:56:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:33,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:56:33,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651272663] [2021-12-17 00:56:33,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651272663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090285451] [2021-12-17 00:56:33,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:56:33,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:33,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:33,227 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:33,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 00:56:33,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 00:56:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:56:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:56:33,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:56:33,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090285451] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:33,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:33,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-17 00:56:33,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044545217] [2021-12-17 00:56:33,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:33,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:56:33,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:56:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:56:33,482 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-17 00:56:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:33,564 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-12-17 00:56:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 00:56:33,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2021-12-17 00:56:33,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:33,565 INFO L225 Difference]: With dead ends: 89 [2021-12-17 00:56:33,565 INFO L226 Difference]: Without dead ends: 69 [2021-12-17 00:56:33,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:56:33,566 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 64 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:33,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 144 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:56:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-17 00:56:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-12-17 00:56:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-12-17 00:56:33,570 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 55 [2021-12-17 00:56:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:33,571 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-12-17 00:56:33,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-17 00:56:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-12-17 00:56:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 00:56:33,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:33,572 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:33,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:33,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:33,792 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:33,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 7 times [2021-12-17 00:56:33,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:33,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204217590] [2021-12-17 00:56:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:33,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:33,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:34,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:34,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:56:34,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:34,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204217590] [2021-12-17 00:56:34,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204217590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:34,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699549659] [2021-12-17 00:56:34,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:56:34,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:34,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:34,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:34,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 00:56:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:34,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 00:56:34,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:34,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:34,334 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:56:34,334 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 25 treesize of output 24 [2021-12-17 00:56:34,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 00:56:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:56:34,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:34,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699549659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:34,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:56:34,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-12-17 00:56:34,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521916467] [2021-12-17 00:56:34,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:34,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 00:56:34,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:34,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 00:56:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 00:56:34,567 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-17 00:56:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:35,010 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-12-17 00:56:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 00:56:35,010 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 59 [2021-12-17 00:56:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:35,011 INFO L225 Difference]: With dead ends: 62 [2021-12-17 00:56:35,011 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 00:56:35,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=2081, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 00:56:35,012 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:35,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 331 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 449 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-17 00:56:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 00:56:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-17 00:56:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-12-17 00:56:35,016 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 59 [2021-12-17 00:56:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:35,016 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-12-17 00:56:35,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-17 00:56:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-12-17 00:56:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 00:56:35,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:35,017 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:35,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:35,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 00:56:35,223 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 8 times [2021-12-17 00:56:35,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:35,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335765347] [2021-12-17 00:56:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:35,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:35,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:35,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:35,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:35,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:35,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:35,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:56:35,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:35,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335765347] [2021-12-17 00:56:35,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335765347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962414764] [2021-12-17 00:56:35,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:56:35,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:35,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:35,457 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:35,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 00:56:35,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:56:35,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:35,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 00:56:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:36,030 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 00:56:36,031 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 25 treesize of output 12 [2021-12-17 00:56:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:56:36,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:36,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:56:36,381 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 42 treesize of output 36 [2021-12-17 00:56:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:56:36,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962414764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:36,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:36,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2021-12-17 00:56:36,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955434891] [2021-12-17 00:56:36,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:36,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 00:56:36,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 00:56:36,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 00:56:36,750 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 45 states, 44 states have (on average 2.227272727272727) internal successors, (98), 40 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:56:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:37,350 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-12-17 00:56:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 00:56:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.227272727272727) internal successors, (98), 40 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 63 [2021-12-17 00:56:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:37,351 INFO L225 Difference]: With dead ends: 80 [2021-12-17 00:56:37,351 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 00:56:37,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=552, Invalid=4004, Unknown=0, NotChecked=0, Total=4556 [2021-12-17 00:56:37,352 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:37,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 303 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 199 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2021-12-17 00:56:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 00:56:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-17 00:56:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:56:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-17 00:56:37,358 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 63 [2021-12-17 00:56:37,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:37,358 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-17 00:56:37,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.227272727272727) internal successors, (98), 40 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:56:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-17 00:56:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 00:56:37,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:37,364 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:37,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:37,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 00:56:37,583 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 9 times [2021-12-17 00:56:37,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511437667] [2021-12-17 00:56:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:37,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:37,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:37,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:37,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:37,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:37,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:37,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:37,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:56:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 00:56:37,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:37,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511437667] [2021-12-17 00:56:37,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511437667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:37,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781928807] [2021-12-17 00:56:37,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:56:37,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:37,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:37,820 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:37,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 00:56:37,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-17 00:56:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 00:56:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:38,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:40,268 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:40,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:56:40,368 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 7 [2021-12-17 00:56:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:56:40,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:40,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:56:40,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:56:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 00:56:40,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781928807] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:40,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:40,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2021-12-17 00:56:40,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251784385] [2021-12-17 00:56:40,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:40,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 00:56:40,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 00:56:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1001, Unknown=1, NotChecked=0, Total=1122 [2021-12-17 00:56:40,751 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 29 states have internal predecessors, (82), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-17 00:56:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:41,060 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-12-17 00:56:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 00:56:41,060 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 29 states have internal predecessors, (82), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) Word has length 71 [2021-12-17 00:56:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:41,061 INFO L225 Difference]: With dead ends: 88 [2021-12-17 00:56:41,061 INFO L226 Difference]: Without dead ends: 86 [2021-12-17 00:56:41,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=199, Invalid=1692, Unknown=1, NotChecked=0, Total=1892 [2021-12-17 00:56:41,062 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:41,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 274 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 434 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2021-12-17 00:56:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-17 00:56:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2021-12-17 00:56:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:56:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-12-17 00:56:41,069 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 71 [2021-12-17 00:56:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:41,069 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-12-17 00:56:41,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 29 states have internal predecessors, (82), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-17 00:56:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-12-17 00:56:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 00:56:41,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:41,070 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:41,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:41,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 00:56:41,279 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:41,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1947082230, now seen corresponding path program 10 times [2021-12-17 00:56:41,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:41,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059131486] [2021-12-17 00:56:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:41,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:41,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:41,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:41,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:41,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:41,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:41,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:41,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:56:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 00:56:41,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:41,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059131486] [2021-12-17 00:56:41,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059131486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:41,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687602830] [2021-12-17 00:56:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:56:41,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:41,538 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:41,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 00:56:41,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:56:41,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 00:56:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:41,942 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 23 treesize of output 7 [2021-12-17 00:56:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 00:56:41,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:42,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:56:42,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:56:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 00:56:42,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687602830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:42,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:42,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 33 [2021-12-17 00:56:42,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938731188] [2021-12-17 00:56:42,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:42,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 00:56:42,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 00:56:42,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 00:56:42,345 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (14), 14 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-17 00:56:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:43,017 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-12-17 00:56:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 00:56:43,017 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (14), 14 states have call predecessors, (14), 11 states have call successors, (14) Word has length 75 [2021-12-17 00:56:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:43,022 INFO L225 Difference]: With dead ends: 114 [2021-12-17 00:56:43,022 INFO L226 Difference]: Without dead ends: 112 [2021-12-17 00:56:43,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 140 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=2537, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 00:56:43,023 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:43,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 493 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:56:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-17 00:56:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2021-12-17 00:56:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:56:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-12-17 00:56:43,036 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 75 [2021-12-17 00:56:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:43,036 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-12-17 00:56:43,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (14), 14 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-17 00:56:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-12-17 00:56:43,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 00:56:43,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:43,037 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:43,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-17 00:56:43,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 00:56:43,249 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:43,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1497562435, now seen corresponding path program 11 times [2021-12-17 00:56:43,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:43,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082641215] [2021-12-17 00:56:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:43,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:56:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:56:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 00:56:43,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082641215] [2021-12-17 00:56:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082641215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031118930] [2021-12-17 00:56:43,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:56:43,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:43,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:43,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 00:56:43,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 00:56:43,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:43,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 00:56:43,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:43,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:45,883 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:45,883 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 [2021-12-17 00:56:50,036 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:50,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-17 00:56:50,138 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 9 [2021-12-17 00:56:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 54 proven. 102 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:56:50,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:50,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031118930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:50,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:56:50,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-12-17 00:56:50,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138590399] [2021-12-17 00:56:50,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:50,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 00:56:50,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 00:56:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=705, Unknown=1, NotChecked=0, Total=812 [2021-12-17 00:56:50,242 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 24 states have internal predecessors, (66), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-17 00:56:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:50,562 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-12-17 00:56:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 00:56:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 24 states have internal predecessors, (66), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 79 [2021-12-17 00:56:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:50,563 INFO L225 Difference]: With dead ends: 100 [2021-12-17 00:56:50,563 INFO L226 Difference]: Without dead ends: 98 [2021-12-17 00:56:50,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=182, Invalid=1299, Unknown=1, NotChecked=0, Total=1482 [2021-12-17 00:56:50,564 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:50,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 379 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 515 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2021-12-17 00:56:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-17 00:56:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2021-12-17 00:56:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:56:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-12-17 00:56:50,569 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 79 [2021-12-17 00:56:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:50,569 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-12-17 00:56:50,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 24 states have internal predecessors, (66), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-17 00:56:50,569 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-12-17 00:56:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 00:56:50,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:50,570 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:50,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:50,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:50,788 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1814327276, now seen corresponding path program 12 times [2021-12-17 00:56:50,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:50,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733931301] [2021-12-17 00:56:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:50,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:50,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:50,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:50,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:50,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:50,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:50,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:50,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:56:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 00:56:50,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733931301] [2021-12-17 00:56:50,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733931301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821973130] [2021-12-17 00:56:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:56:50,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:50,882 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:50,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 00:56:50,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 00:56:50,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:50,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 00:56:50,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 00:56:51,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 00:56:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821973130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:51,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:51,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-17 00:56:51,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346773597] [2021-12-17 00:56:51,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:51,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 00:56:51,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 00:56:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-17 00:56:51,271 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-17 00:56:51,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:51,374 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-12-17 00:56:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:56:51,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2021-12-17 00:56:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:51,375 INFO L225 Difference]: With dead ends: 121 [2021-12-17 00:56:51,375 INFO L226 Difference]: Without dead ends: 93 [2021-12-17 00:56:51,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-17 00:56:51,376 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 114 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:51,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 142 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:56:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-17 00:56:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-12-17 00:56:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:56:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-12-17 00:56:51,381 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 79 [2021-12-17 00:56:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:51,382 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-12-17 00:56:51,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-17 00:56:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-12-17 00:56:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 00:56:51,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:51,382 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:51,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-17 00:56:51,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 00:56:51,591 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -502341447, now seen corresponding path program 13 times [2021-12-17 00:56:51,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:51,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286975006] [2021-12-17 00:56:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:51,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:56:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:56:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 00:56:51,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:51,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286975006] [2021-12-17 00:56:51,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286975006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:51,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136111328] [2021-12-17 00:56:51,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:56:51,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:51,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:51,860 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:51,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 00:56:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:51,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 00:56:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:52,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:52,341 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:52,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:56:52,472 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 7 [2021-12-17 00:56:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 40 proven. 116 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 00:56:52,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:52,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:56:52,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:56:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 00:56:52,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136111328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:52,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:52,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2021-12-17 00:56:52,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253057747] [2021-12-17 00:56:52,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:52,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 00:56:52,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 00:56:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 00:56:52,869 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 32 states have internal predecessors, (95), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:56:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:53,289 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2021-12-17 00:56:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 00:56:53,289 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 32 states have internal predecessors, (95), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 83 [2021-12-17 00:56:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:53,290 INFO L225 Difference]: With dead ends: 114 [2021-12-17 00:56:53,290 INFO L226 Difference]: Without dead ends: 112 [2021-12-17 00:56:53,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 157 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 00:56:53,291 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 62 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:53,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 464 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 707 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2021-12-17 00:56:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-17 00:56:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 89. [2021-12-17 00:56:53,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:56:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-17 00:56:53,302 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 83 [2021-12-17 00:56:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:53,302 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-17 00:56:53,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 32 states have internal predecessors, (95), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:56:53,302 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-17 00:56:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 00:56:53,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:53,303 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:53,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:53,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 00:56:53,523 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:53,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1833952977, now seen corresponding path program 14 times [2021-12-17 00:56:53,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:53,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491012821] [2021-12-17 00:56:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:53,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:56:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:56:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 00:56:53,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:53,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491012821] [2021-12-17 00:56:53,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491012821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:53,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533528722] [2021-12-17 00:56:53,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:56:53,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:53,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:53,775 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:53,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 00:56:53,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:56:53,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 00:56:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:54,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:54,565 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 00:56:54,568 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 25 treesize of output 12 [2021-12-17 00:56:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 66 proven. 86 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 00:56:54,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:55,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:56:55,035 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 42 treesize of output 36 [2021-12-17 00:56:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 61 proven. 91 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 00:56:55,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533528722] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:55,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:56:55,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 56 [2021-12-17 00:56:55,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446312792] [2021-12-17 00:56:55,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:55,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-17 00:56:55,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-17 00:56:55,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2736, Unknown=0, NotChecked=0, Total=3080 [2021-12-17 00:56:55,522 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 56 states, 56 states have (on average 2.5) internal successors, (140), 51 states have internal predecessors, (140), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2021-12-17 00:56:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:56,660 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-12-17 00:56:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 00:56:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.5) internal successors, (140), 51 states have internal predecessors, (140), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 87 [2021-12-17 00:56:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:56,661 INFO L225 Difference]: With dead ends: 112 [2021-12-17 00:56:56,662 INFO L226 Difference]: Without dead ends: 84 [2021-12-17 00:56:56,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=951, Invalid=7605, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 00:56:56,664 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:56,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 603 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 491 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2021-12-17 00:56:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-17 00:56:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-17 00:56:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:56:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-12-17 00:56:56,670 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 87 [2021-12-17 00:56:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:56,670 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-12-17 00:56:56,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.5) internal successors, (140), 51 states have internal predecessors, (140), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2021-12-17 00:56:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-12-17 00:56:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 00:56:56,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:56,671 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:56,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:56,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:56,880 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash 474886268, now seen corresponding path program 15 times [2021-12-17 00:56:56,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:56,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202098661] [2021-12-17 00:56:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:56,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:56:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:56:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:56:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:56:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:56:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:56:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:56:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:56:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:56:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 147 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 00:56:57,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202098661] [2021-12-17 00:56:57,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202098661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585161826] [2021-12-17 00:56:57,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:56:57,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:57,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:57,187 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:56:57,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 00:56:57,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 00:56:57,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-17 00:56:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:57,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:56:59,714 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:59,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:56:59,858 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:56:59,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:57:00,017 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 7 [2021-12-17 00:57:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 65 proven. 144 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-17 00:57:00,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:00,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585161826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:00,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:57:00,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-12-17 00:57:00,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638045319] [2021-12-17 00:57:00,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:00,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 00:57:00,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 00:57:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2021-12-17 00:57:00,134 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 27 states have internal predecessors, (77), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 00:57:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:00,568 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-12-17 00:57:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 00:57:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 27 states have internal predecessors, (77), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 91 [2021-12-17 00:57:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:00,569 INFO L225 Difference]: With dead ends: 93 [2021-12-17 00:57:00,569 INFO L226 Difference]: Without dead ends: 91 [2021-12-17 00:57:00,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 113 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=220, Invalid=1759, Unknown=1, NotChecked=0, Total=1980 [2021-12-17 00:57:00,570 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:00,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 316 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 649 Invalid, 0 Unknown, 155 Unchecked, 0.3s Time] [2021-12-17 00:57:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-17 00:57:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-17 00:57:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:57:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-12-17 00:57:00,576 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 91 [2021-12-17 00:57:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:00,576 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-12-17 00:57:00,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 27 states have internal predecessors, (77), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 00:57:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-12-17 00:57:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 00:57:00,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:00,577 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:00,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:00,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:00,780 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -110375054, now seen corresponding path program 16 times [2021-12-17 00:57:00,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:00,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417904531] [2021-12-17 00:57:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:00,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 00:57:01,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:01,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417904531] [2021-12-17 00:57:01,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417904531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:01,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898617697] [2021-12-17 00:57:01,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:57:01,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:01,078 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:01,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 00:57:01,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:57:01,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 00:57:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:01,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:01,574 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:57:01,575 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 [2021-12-17 00:57:01,741 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 9 [2021-12-17 00:57:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 00:57:01,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:01,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898617697] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:01,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:57:01,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2021-12-17 00:57:01,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456610186] [2021-12-17 00:57:01,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:01,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 00:57:01,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 00:57:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 00:57:01,882 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 28 states have internal predecessors, (82), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-17 00:57:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:02,363 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-12-17 00:57:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 00:57:02,363 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 28 states have internal predecessors, (82), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 95 [2021-12-17 00:57:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:02,364 INFO L225 Difference]: With dead ends: 124 [2021-12-17 00:57:02,364 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 00:57:02,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 00:57:02,365 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 51 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:02,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 496 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 902 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2021-12-17 00:57:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 00:57:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2021-12-17 00:57:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 00:57:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-12-17 00:57:02,372 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 95 [2021-12-17 00:57:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:02,373 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-12-17 00:57:02,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 28 states have internal predecessors, (82), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-17 00:57:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-12-17 00:57:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 00:57:02,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:02,374 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:02,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-17 00:57:02,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:02,583 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1072364696, now seen corresponding path program 17 times [2021-12-17 00:57:02,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:02,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106341515] [2021-12-17 00:57:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:02,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 00:57:02,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:02,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106341515] [2021-12-17 00:57:02,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106341515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:02,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584989003] [2021-12-17 00:57:02,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:57:02,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:02,903 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:02,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 00:57:02,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-17 00:57:02,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 00:57:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:03,372 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 [2021-12-17 00:57:03,580 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 7 [2021-12-17 00:57:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 00:57:03,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:03,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:57:03,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:57:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 00:57:04,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584989003] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:04,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:04,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 42 [2021-12-17 00:57:04,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3917626] [2021-12-17 00:57:04,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:04,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 00:57:04,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 00:57:04,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 00:57:04,042 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-17 00:57:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:05,037 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2021-12-17 00:57:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 00:57:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 99 [2021-12-17 00:57:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:05,040 INFO L225 Difference]: With dead ends: 150 [2021-12-17 00:57:05,040 INFO L226 Difference]: Without dead ends: 148 [2021-12-17 00:57:05,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 189 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=424, Invalid=4268, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 00:57:05,041 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 156 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:05,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 879 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 00:57:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-17 00:57:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2021-12-17 00:57:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 00:57:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-12-17 00:57:05,048 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2021-12-17 00:57:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:05,048 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-12-17 00:57:05,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-17 00:57:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-12-17 00:57:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 00:57:05,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:05,049 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:05,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:05,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 00:57:05,250 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:05,250 INFO L85 PathProgramCache]: Analyzing trace with hash -369454411, now seen corresponding path program 18 times [2021-12-17 00:57:05,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:05,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840142953] [2021-12-17 00:57:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:05,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 197 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 00:57:05,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840142953] [2021-12-17 00:57:05,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840142953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730358470] [2021-12-17 00:57:05,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:57:05,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:05,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:05,549 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:05,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 00:57:05,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-17 00:57:05,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 00:57:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:05,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:06,085 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:57:06,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:57:06,173 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:57:06,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:57:06,336 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 7 [2021-12-17 00:57:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 76 proven. 194 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-17 00:57:06,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:06,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:57:06,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:57:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-17 00:57:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730358470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:06,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:06,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 43 [2021-12-17 00:57:06,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426613471] [2021-12-17 00:57:06,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:06,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 00:57:06,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 00:57:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 00:57:06,877 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 38 states have internal predecessors, (115), 17 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 19 states have call predecessors, (20), 17 states have call successors, (20) [2021-12-17 00:57:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:07,547 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2021-12-17 00:57:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 00:57:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 38 states have internal predecessors, (115), 17 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 19 states have call predecessors, (20), 17 states have call successors, (20) Word has length 103 [2021-12-17 00:57:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:07,549 INFO L225 Difference]: With dead ends: 137 [2021-12-17 00:57:07,549 INFO L226 Difference]: Without dead ends: 135 [2021-12-17 00:57:07,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 192 SyntacticMatches, 16 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 00:57:07,549 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:07,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 861 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1449 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2021-12-17 00:57:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-17 00:57:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-12-17 00:57:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 00:57:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-12-17 00:57:07,556 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 103 [2021-12-17 00:57:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:07,557 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-12-17 00:57:07,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 38 states have internal predecessors, (115), 17 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 19 states have call predecessors, (20), 17 states have call successors, (20) [2021-12-17 00:57:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-12-17 00:57:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 00:57:07,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:07,557 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:07,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:07,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 00:57:07,775 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:07,775 INFO L85 PathProgramCache]: Analyzing trace with hash -428389282, now seen corresponding path program 19 times [2021-12-17 00:57:07,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:07,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25095486] [2021-12-17 00:57:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:07,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 00:57:07,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:07,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25095486] [2021-12-17 00:57:07,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25095486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:07,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459098284] [2021-12-17 00:57:07,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:57:07,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:07,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:07,917 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:07,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 00:57:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:07,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 00:57:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 00:57:08,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 00:57:08,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459098284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:08,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:08,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-17 00:57:08,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880543976] [2021-12-17 00:57:08,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:08,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 00:57:08,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:08,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 00:57:08,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-12-17 00:57:08,386 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-17 00:57:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:08,573 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-12-17 00:57:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 00:57:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 103 [2021-12-17 00:57:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:08,574 INFO L225 Difference]: With dead ends: 153 [2021-12-17 00:57:08,574 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 00:57:08,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 00:57:08,576 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:08,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 256 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:57:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 00:57:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2021-12-17 00:57:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 00:57:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-12-17 00:57:08,583 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 103 [2021-12-17 00:57:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:08,587 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-12-17 00:57:08,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-17 00:57:08,588 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-12-17 00:57:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 00:57:08,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:08,588 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:08,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:08,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:08,805 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:08,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2033872171, now seen corresponding path program 20 times [2021-12-17 00:57:08,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:08,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108358032] [2021-12-17 00:57:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:08,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 00:57:09,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:09,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108358032] [2021-12-17 00:57:09,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108358032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:09,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286933215] [2021-12-17 00:57:09,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:57:09,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:09,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:09,100 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:09,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 00:57:09,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:57:09,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:09,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 00:57:09,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:09,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:09,724 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:57:09,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:57:09,930 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 23 treesize of output 7 [2021-12-17 00:57:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 54 proven. 216 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 00:57:09,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:10,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:57:10,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:57:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 00:57:10,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286933215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:10,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:10,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 44 [2021-12-17 00:57:10,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129239952] [2021-12-17 00:57:10,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:10,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 00:57:10,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 00:57:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1733, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 00:57:10,387 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 40 states have internal predecessors, (123), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-17 00:57:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:10,880 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2021-12-17 00:57:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 00:57:10,880 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 40 states have internal predecessors, (123), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) Word has length 107 [2021-12-17 00:57:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:10,881 INFO L225 Difference]: With dead ends: 140 [2021-12-17 00:57:10,881 INFO L226 Difference]: Without dead ends: 138 [2021-12-17 00:57:10,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 207 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=2932, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 00:57:10,882 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 72 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:10,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 615 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 922 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2021-12-17 00:57:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-17 00:57:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2021-12-17 00:57:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:57:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2021-12-17 00:57:10,890 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 107 [2021-12-17 00:57:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:10,890 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2021-12-17 00:57:10,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 40 states have internal predecessors, (123), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-17 00:57:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2021-12-17 00:57:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 00:57:10,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:10,891 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:10,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:11,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:11,103 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1467751585, now seen corresponding path program 21 times [2021-12-17 00:57:11,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:11,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434792927] [2021-12-17 00:57:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:11,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 00:57:11,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:11,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434792927] [2021-12-17 00:57:11,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434792927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:11,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908765965] [2021-12-17 00:57:11,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:57:11,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:11,443 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:11,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 00:57:11,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 00:57:11,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:11,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 00:57:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:11,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:12,437 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-17 00:57:12,437 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 21 treesize of output 10 [2021-12-17 00:57:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 00:57:12,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:57:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:57:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 00:57:13,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908765965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:13,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:13,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 59 [2021-12-17 00:57:13,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758122961] [2021-12-17 00:57:13,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:13,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-17 00:57:13,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-17 00:57:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=2997, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 00:57:13,514 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 59 states, 59 states have (on average 2.694915254237288) internal successors, (159), 54 states have internal predecessors, (159), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (20), 20 states have call predecessors, (20), 17 states have call successors, (20) [2021-12-17 00:57:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:14,402 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2021-12-17 00:57:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 00:57:14,404 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.694915254237288) internal successors, (159), 54 states have internal predecessors, (159), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (20), 20 states have call predecessors, (20), 17 states have call successors, (20) Word has length 111 [2021-12-17 00:57:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:14,404 INFO L225 Difference]: With dead ends: 171 [2021-12-17 00:57:14,404 INFO L226 Difference]: Without dead ends: 169 [2021-12-17 00:57:14,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 203 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=594, Invalid=4956, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 00:57:14,405 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 139 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:14,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 648 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1004 Invalid, 0 Unknown, 84 Unchecked, 0.4s Time] [2021-12-17 00:57:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-17 00:57:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2021-12-17 00:57:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:57:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2021-12-17 00:57:14,417 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 111 [2021-12-17 00:57:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:14,417 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2021-12-17 00:57:14,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.694915254237288) internal successors, (159), 54 states have internal predecessors, (159), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (20), 20 states have call predecessors, (20), 17 states have call successors, (20) [2021-12-17 00:57:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2021-12-17 00:57:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 00:57:14,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:14,418 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:14,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:14,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 00:57:14,636 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1057448942, now seen corresponding path program 22 times [2021-12-17 00:57:14,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:14,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446029587] [2021-12-17 00:57:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:14,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 255 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-17 00:57:14,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446029587] [2021-12-17 00:57:14,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446029587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871770655] [2021-12-17 00:57:14,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:57:14,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:14,988 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:15,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 00:57:15,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:57:15,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:15,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 00:57:15,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:15,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:15,549 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:57:15,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:57:15,645 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:57:15,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:57:15,847 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 7 [2021-12-17 00:57:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 87 proven. 252 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-17 00:57:15,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:16,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:57:16,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:57:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 254 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-17 00:57:16,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871770655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:16,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:16,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 47 [2021-12-17 00:57:16,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934966490] [2021-12-17 00:57:16,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 00:57:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 00:57:16,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 00:57:16,409 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 47 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 42 states have internal predecessors, (129), 19 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 21 states have call predecessors, (22), 19 states have call successors, (22) [2021-12-17 00:57:17,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:17,286 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2021-12-17 00:57:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 00:57:17,287 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 42 states have internal predecessors, (129), 19 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 21 states have call predecessors, (22), 19 states have call successors, (22) Word has length 115 [2021-12-17 00:57:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:17,288 INFO L225 Difference]: With dead ends: 181 [2021-12-17 00:57:17,288 INFO L226 Difference]: Without dead ends: 179 [2021-12-17 00:57:17,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 216 SyntacticMatches, 16 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=3595, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 00:57:17,290 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 82 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:17,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1107 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1816 Invalid, 0 Unknown, 60 Unchecked, 0.6s Time] [2021-12-17 00:57:17,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-17 00:57:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 145. [2021-12-17 00:57:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:57:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2021-12-17 00:57:17,302 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 115 [2021-12-17 00:57:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:17,302 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2021-12-17 00:57:17,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 42 states have internal predecessors, (129), 19 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 21 states have call predecessors, (22), 19 states have call successors, (22) [2021-12-17 00:57:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2021-12-17 00:57:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 00:57:17,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:17,303 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:17,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:17,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 00:57:17,513 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash -325453340, now seen corresponding path program 23 times [2021-12-17 00:57:17,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:17,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292690702] [2021-12-17 00:57:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:17,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-17 00:57:17,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:17,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292690702] [2021-12-17 00:57:17,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292690702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:17,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132293855] [2021-12-17 00:57:17,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:57:17,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:17,892 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:17,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 00:57:18,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-17 00:57:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 00:57:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:18,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:18,662 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:57:18,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:57:18,922 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 7 [2021-12-17 00:57:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 278 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 00:57:18,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:19,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:57:19,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:57:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-17 00:57:19,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132293855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:19,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:19,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 50 [2021-12-17 00:57:19,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998756904] [2021-12-17 00:57:19,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:19,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 00:57:19,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 00:57:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 00:57:19,481 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 50 states, 49 states have (on average 2.816326530612245) internal successors, (138), 45 states have internal predecessors, (138), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-17 00:57:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:20,318 INFO L93 Difference]: Finished difference Result 221 states and 226 transitions. [2021-12-17 00:57:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 00:57:20,318 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.816326530612245) internal successors, (138), 45 states have internal predecessors, (138), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) Word has length 119 [2021-12-17 00:57:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:20,319 INFO L225 Difference]: With dead ends: 221 [2021-12-17 00:57:20,319 INFO L226 Difference]: Without dead ends: 219 [2021-12-17 00:57:20,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 230 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=328, Invalid=4094, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 00:57:20,320 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 98 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:20,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 933 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1773 Invalid, 0 Unknown, 71 Unchecked, 0.6s Time] [2021-12-17 00:57:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-17 00:57:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 154. [2021-12-17 00:57:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 131 states have internal predecessors, (135), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 00:57:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2021-12-17 00:57:20,333 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 119 [2021-12-17 00:57:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:20,333 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2021-12-17 00:57:20,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.816326530612245) internal successors, (138), 45 states have internal predecessors, (138), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-17 00:57:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2021-12-17 00:57:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 00:57:20,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:20,334 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:20,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:20,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 00:57:20,552 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1033591590, now seen corresponding path program 24 times [2021-12-17 00:57:20,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574758501] [2021-12-17 00:57:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:20,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-17 00:57:20,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574758501] [2021-12-17 00:57:20,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574758501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069648789] [2021-12-17 00:57:20,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:57:20,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:20,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:20,985 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:20,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 00:57:21,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-17 00:57:21,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:21,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 00:57:21,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:22,235 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-17 00:57:22,235 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 21 treesize of output 10 [2021-12-17 00:57:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-17 00:57:22,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:22,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:57:22,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:57:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-17 00:57:23,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069648789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:23,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:23,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 64 [2021-12-17 00:57:23,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121199994] [2021-12-17 00:57:23,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:23,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-17 00:57:23,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:23,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-17 00:57:23,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3545, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 00:57:23,383 INFO L87 Difference]: Start difference. First operand 154 states and 159 transitions. Second operand has 64 states, 64 states have (on average 2.765625) internal successors, (177), 59 states have internal predecessors, (177), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (22), 22 states have call predecessors, (22), 19 states have call successors, (22) [2021-12-17 00:57:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:25,591 INFO L93 Difference]: Finished difference Result 254 states and 267 transitions. [2021-12-17 00:57:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 00:57:25,591 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.765625) internal successors, (177), 59 states have internal predecessors, (177), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (22), 22 states have call predecessors, (22), 19 states have call successors, (22) Word has length 123 [2021-12-17 00:57:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:25,592 INFO L225 Difference]: With dead ends: 254 [2021-12-17 00:57:25,592 INFO L226 Difference]: Without dead ends: 252 [2021-12-17 00:57:25,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 224 SyntacticMatches, 12 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4321 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1233, Invalid=12107, Unknown=0, NotChecked=0, Total=13340 [2021-12-17 00:57:25,594 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 264 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:25,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1284 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1568 Invalid, 0 Unknown, 300 Unchecked, 0.6s Time] [2021-12-17 00:57:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-17 00:57:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 162. [2021-12-17 00:57:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 00:57:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2021-12-17 00:57:25,610 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 123 [2021-12-17 00:57:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:25,610 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2021-12-17 00:57:25,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.765625) internal successors, (177), 59 states have internal predecessors, (177), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (22), 22 states have call predecessors, (22), 19 states have call successors, (22) [2021-12-17 00:57:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2021-12-17 00:57:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 00:57:25,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:25,611 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:25,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:25,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 00:57:25,829 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:25,829 INFO L85 PathProgramCache]: Analyzing trace with hash -160177113, now seen corresponding path program 25 times [2021-12-17 00:57:25,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:25,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857522976] [2021-12-17 00:57:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:25,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:57:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 321 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-17 00:57:26,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:26,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857522976] [2021-12-17 00:57:26,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857522976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:26,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731423553] [2021-12-17 00:57:26,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:57:26,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:26,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:26,227 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:26,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 00:57:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:26,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 00:57:26,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:26,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:26,784 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:57:26,785 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 27 treesize of output 26 [2021-12-17 00:57:26,955 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:57:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:57:27,190 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 7 [2021-12-17 00:57:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 98 proven. 318 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-17 00:57:27,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:27,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731423553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:27,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:57:27,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-12-17 00:57:27,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160601079] [2021-12-17 00:57:27,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:27,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 00:57:27,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:27,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 00:57:27,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 00:57:27,339 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 36 states have internal predecessors, (110), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:57:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:28,369 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2021-12-17 00:57:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 00:57:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 36 states have internal predecessors, (110), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 127 [2021-12-17 00:57:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:28,371 INFO L225 Difference]: With dead ends: 230 [2021-12-17 00:57:28,371 INFO L226 Difference]: Without dead ends: 228 [2021-12-17 00:57:28,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=3648, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 00:57:28,372 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 74 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:28,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 919 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1599 Invalid, 0 Unknown, 163 Unchecked, 0.6s Time] [2021-12-17 00:57:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-17 00:57:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 162. [2021-12-17 00:57:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 00:57:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2021-12-17 00:57:28,390 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 127 [2021-12-17 00:57:28,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:28,390 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2021-12-17 00:57:28,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 36 states have internal predecessors, (110), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:57:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2021-12-17 00:57:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 00:57:28,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:28,391 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:28,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:28,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:28,599 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash 485078429, now seen corresponding path program 26 times [2021-12-17 00:57:28,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003351874] [2021-12-17 00:57:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:28,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:28,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:57:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-17 00:57:29,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003351874] [2021-12-17 00:57:29,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003351874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602185719] [2021-12-17 00:57:29,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:57:29,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:29,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:29,046 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:29,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 00:57:29,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:57:29,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 00:57:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:29,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:31,664 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:57:31,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:57:31,945 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 7 [2021-12-17 00:57:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 68 proven. 348 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-17 00:57:31,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:32,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602185719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:32,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:57:32,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 40 [2021-12-17 00:57:32,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080097877] [2021-12-17 00:57:32,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:32,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 00:57:32,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 00:57:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1574, Unknown=1, NotChecked=0, Total=1722 [2021-12-17 00:57:32,116 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand has 40 states, 40 states have (on average 2.875) internal successors, (115), 37 states have internal predecessors, (115), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-17 00:57:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:33,082 INFO L93 Difference]: Finished difference Result 275 states and 281 transitions. [2021-12-17 00:57:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 00:57:33,083 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 37 states have internal predecessors, (115), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) Word has length 131 [2021-12-17 00:57:33,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:33,084 INFO L225 Difference]: With dead ends: 275 [2021-12-17 00:57:33,084 INFO L226 Difference]: Without dead ends: 273 [2021-12-17 00:57:33,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 178 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=315, Invalid=4106, Unknown=1, NotChecked=0, Total=4422 [2021-12-17 00:57:33,085 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 105 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:33,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1301 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1708 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2021-12-17 00:57:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-17 00:57:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 171. [2021-12-17 00:57:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 146 states have internal predecessors, (151), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:57:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 177 transitions. [2021-12-17 00:57:33,107 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 177 transitions. Word has length 131 [2021-12-17 00:57:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:33,108 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 177 transitions. [2021-12-17 00:57:33,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 37 states have internal predecessors, (115), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-17 00:57:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 177 transitions. [2021-12-17 00:57:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 00:57:33,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:33,111 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:33,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:33,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:33,319 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2003969005, now seen corresponding path program 27 times [2021-12-17 00:57:33,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911368789] [2021-12-17 00:57:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:33,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:57:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-17 00:57:33,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:33,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911368789] [2021-12-17 00:57:33,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911368789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:33,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472581107] [2021-12-17 00:57:33,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:57:33,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:33,719 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:33,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 00:57:33,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-17 00:57:33,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 00:57:33,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:34,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:35,286 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-17 00:57:35,286 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 21 treesize of output 10 [2021-12-17 00:57:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-17 00:57:35,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:35,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:57:35,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:57:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-17 00:57:36,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472581107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:36,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:36,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 79 [2021-12-17 00:57:36,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233896806] [2021-12-17 00:57:36,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:36,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-17 00:57:36,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-17 00:57:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=5489, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 00:57:36,620 INFO L87 Difference]: Start difference. First operand 171 states and 177 transitions. Second operand has 79 states, 79 states have (on average 2.8354430379746836) internal successors, (224), 74 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2021-12-17 00:57:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:40,253 INFO L93 Difference]: Finished difference Result 335 states and 350 transitions. [2021-12-17 00:57:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-17 00:57:40,253 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.8354430379746836) internal successors, (224), 74 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 135 [2021-12-17 00:57:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:40,254 INFO L225 Difference]: With dead ends: 335 [2021-12-17 00:57:40,254 INFO L226 Difference]: Without dead ends: 333 [2021-12-17 00:57:40,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 239 SyntacticMatches, 6 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7648 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2076, Invalid=21486, Unknown=0, NotChecked=0, Total=23562 [2021-12-17 00:57:40,256 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 595 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:40,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 1545 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2289 Invalid, 0 Unknown, 155 Unchecked, 1.0s Time] [2021-12-17 00:57:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-17 00:57:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 179. [2021-12-17 00:57:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 154 states have (on average 1.0324675324675325) internal successors, (159), 154 states have internal predecessors, (159), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:57:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2021-12-17 00:57:40,278 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 135 [2021-12-17 00:57:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:40,278 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2021-12-17 00:57:40,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.8354430379746836) internal successors, (224), 74 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2021-12-17 00:57:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2021-12-17 00:57:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 00:57:40,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:40,279 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:40,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:40,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-17 00:57:40,489 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:40,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1501516640, now seen corresponding path program 28 times [2021-12-17 00:57:40,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:40,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454636010] [2021-12-17 00:57:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:40,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:57:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:57:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 395 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-17 00:57:40,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:40,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454636010] [2021-12-17 00:57:40,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454636010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:40,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439510923] [2021-12-17 00:57:40,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:57:40,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:40,897 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:40,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 00:57:41,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:57:41,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:41,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-17 00:57:41,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:41,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:41,628 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:57:41,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:57:41,739 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:57:41,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:57:42,032 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 7 [2021-12-17 00:57:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 109 proven. 392 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-17 00:57:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:42,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:57:42,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:57:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 394 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-17 00:57:42,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439510923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:42,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:42,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2021-12-17 00:57:42,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132002884] [2021-12-17 00:57:42,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:42,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 00:57:42,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 00:57:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 00:57:42,630 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2021-12-17 00:57:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:44,526 INFO L93 Difference]: Finished difference Result 359 states and 365 transitions. [2021-12-17 00:57:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-17 00:57:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) Word has length 139 [2021-12-17 00:57:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:44,527 INFO L225 Difference]: With dead ends: 359 [2021-12-17 00:57:44,528 INFO L226 Difference]: Without dead ends: 357 [2021-12-17 00:57:44,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 264 SyntacticMatches, 17 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=731, Invalid=9775, Unknown=0, NotChecked=0, Total=10506 [2021-12-17 00:57:44,529 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 179 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 3452 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 3711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:44,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 2233 Invalid, 3711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3452 Invalid, 0 Unknown, 94 Unchecked, 1.1s Time] [2021-12-17 00:57:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-17 00:57:44,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 179. [2021-12-17 00:57:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 154 states have (on average 1.0324675324675325) internal successors, (159), 154 states have internal predecessors, (159), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:57:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2021-12-17 00:57:44,556 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 139 [2021-12-17 00:57:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:44,557 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2021-12-17 00:57:44,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2021-12-17 00:57:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2021-12-17 00:57:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 00:57:44,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:44,558 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:44,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-17 00:57:44,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:44,776 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash 566812758, now seen corresponding path program 29 times [2021-12-17 00:57:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:44,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322911023] [2021-12-17 00:57:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:44,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:57:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:57:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-17 00:57:45,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322911023] [2021-12-17 00:57:45,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322911023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581546046] [2021-12-17 00:57:45,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:57:45,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:45,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:45,248 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:45,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 00:57:45,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-17 00:57:45,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:45,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 00:57:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:45,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:57:47,958 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:57:47,958 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 27 treesize of output 26 [2021-12-17 00:57:48,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-17 00:57:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 75 proven. 426 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-17 00:57:48,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:48,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581546046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:48,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:57:48,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 43 [2021-12-17 00:57:48,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906328771] [2021-12-17 00:57:48,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:48,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 00:57:48,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:48,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 00:57:48,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1821, Unknown=1, NotChecked=0, Total=1980 [2021-12-17 00:57:48,495 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 40 states have internal predecessors, (126), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:57:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:49,797 INFO L93 Difference]: Finished difference Result 383 states and 390 transitions. [2021-12-17 00:57:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 00:57:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 40 states have internal predecessors, (126), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 143 [2021-12-17 00:57:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:49,798 INFO L225 Difference]: With dead ends: 383 [2021-12-17 00:57:49,798 INFO L226 Difference]: Without dead ends: 381 [2021-12-17 00:57:49,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 188 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=368, Invalid=5033, Unknown=1, NotChecked=0, Total=5402 [2021-12-17 00:57:49,799 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 109 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:49,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1580 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2451 Invalid, 0 Unknown, 133 Unchecked, 0.8s Time] [2021-12-17 00:57:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-17 00:57:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 188. [2021-12-17 00:57:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 161 states have (on average 1.0372670807453417) internal successors, (167), 161 states have internal predecessors, (167), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 00:57:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2021-12-17 00:57:49,821 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 143 [2021-12-17 00:57:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:49,822 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2021-12-17 00:57:49,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 40 states have internal predecessors, (126), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:57:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2021-12-17 00:57:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 00:57:49,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:49,822 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 10, 10, 10, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:49,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:50,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:50,023 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash 580881489, now seen corresponding path program 30 times [2021-12-17 00:57:50,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:50,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654235597] [2021-12-17 00:57:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:50,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 393 proven. 177 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 00:57:50,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:50,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654235597] [2021-12-17 00:57:50,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654235597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:50,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745715433] [2021-12-17 00:57:50,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:57:50,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:50,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:50,275 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:50,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 00:57:50,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-17 00:57:50,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 00:57:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 450 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 00:57:51,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 450 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 00:57:51,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745715433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:51,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:51,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 61 [2021-12-17 00:57:51,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294326914] [2021-12-17 00:57:51,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:51,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 00:57:51,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:51,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 00:57:51,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=2723, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 00:57:51,446 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand has 61 states, 61 states have (on average 3.5901639344262297) internal successors, (219), 61 states have internal predecessors, (219), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2021-12-17 00:57:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:53,109 INFO L93 Difference]: Finished difference Result 668 states and 684 transitions. [2021-12-17 00:57:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-17 00:57:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.5901639344262297) internal successors, (219), 61 states have internal predecessors, (219), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 143 [2021-12-17 00:57:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:53,111 INFO L225 Difference]: With dead ends: 668 [2021-12-17 00:57:53,111 INFO L226 Difference]: Without dead ends: 500 [2021-12-17 00:57:53,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4531, Invalid=21229, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 00:57:53,113 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1456 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:53,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 437 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:57:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-12-17 00:57:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 363. [2021-12-17 00:57:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 332 states have (on average 1.036144578313253) internal successors, (344), 332 states have internal predecessors, (344), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:57:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 380 transitions. [2021-12-17 00:57:53,169 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 380 transitions. Word has length 143 [2021-12-17 00:57:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:53,169 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 380 transitions. [2021-12-17 00:57:53,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.5901639344262297) internal successors, (219), 61 states have internal predecessors, (219), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2021-12-17 00:57:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 380 transitions. [2021-12-17 00:57:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 00:57:53,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:53,170 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:53,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:53,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-17 00:57:53,391 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1610023500, now seen corresponding path program 31 times [2021-12-17 00:57:53,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:53,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409509105] [2021-12-17 00:57:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:53,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:57:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:57:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 36 proven. 461 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-17 00:57:53,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:53,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409509105] [2021-12-17 00:57:53,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409509105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:53,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203797137] [2021-12-17 00:57:53,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:57:53,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:53,825 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:53,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 00:57:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-17 00:57:53,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:54,609 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 [2021-12-17 00:57:54,991 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 7 [2021-12-17 00:57:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 36 proven. 461 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-17 00:57:55,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:55,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:57:55,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:57:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 36 proven. 461 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-17 00:57:55,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203797137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:57:55,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:57:55,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 56 [2021-12-17 00:57:55,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536120870] [2021-12-17 00:57:55,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:55,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-17 00:57:55,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:55,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-17 00:57:55,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2896, Unknown=0, NotChecked=0, Total=3080 [2021-12-17 00:57:55,545 INFO L87 Difference]: Start difference. First operand 363 states and 380 transitions. Second operand has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 52 states have internal predecessors, (170), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2021-12-17 00:57:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:57,127 INFO L93 Difference]: Finished difference Result 413 states and 435 transitions. [2021-12-17 00:57:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 00:57:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 52 states have internal predecessors, (170), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) Word has length 147 [2021-12-17 00:57:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:57,129 INFO L225 Difference]: With dead ends: 413 [2021-12-17 00:57:57,129 INFO L226 Difference]: Without dead ends: 368 [2021-12-17 00:57:57,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 285 SyntacticMatches, 10 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=567, Invalid=7989, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 00:57:57,130 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 209 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 2825 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:57,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1497 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2825 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 00:57:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-17 00:57:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 324. [2021-12-17 00:57:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.0375426621160408) internal successors, (304), 293 states have internal predecessors, (304), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:57:57,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 340 transitions. [2021-12-17 00:57:57,180 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 340 transitions. Word has length 147 [2021-12-17 00:57:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:57,180 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 340 transitions. [2021-12-17 00:57:57,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 52 states have internal predecessors, (170), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2021-12-17 00:57:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 340 transitions. [2021-12-17 00:57:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 00:57:57,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:57,181 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:57,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:57,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-17 00:57:57,395 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 799601049, now seen corresponding path program 32 times [2021-12-17 00:57:57,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:57,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693906296] [2021-12-17 00:57:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:57,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:57:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:57:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:57:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:57:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:57:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:57:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:57:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:57:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:57:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:57:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:57:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:57:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:57:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:57:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 477 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-17 00:57:57,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:57,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693906296] [2021-12-17 00:57:57,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693906296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:57,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699024033] [2021-12-17 00:57:57,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:57:57,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:57,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:57,906 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:57:57,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 00:57:58,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:57:58,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:58,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-17 00:57:58,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:58,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:58:02,587 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:58:02,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:58:02,737 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:58:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:58:03,055 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 7 [2021-12-17 00:58:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 120 proven. 474 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-17 00:58:03,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:03,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699024033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:03,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:58:03,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2021-12-17 00:58:03,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382660626] [2021-12-17 00:58:03,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:03,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 00:58:03,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:03,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 00:58:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1988, Unknown=2, NotChecked=0, Total=2162 [2021-12-17 00:58:03,226 INFO L87 Difference]: Start difference. First operand 324 states and 340 transitions. Second operand has 45 states, 45 states have (on average 2.933333333333333) internal successors, (132), 42 states have internal predecessors, (132), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-12-17 00:58:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:03,972 INFO L93 Difference]: Finished difference Result 354 states and 373 transitions. [2021-12-17 00:58:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 00:58:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.933333333333333) internal successors, (132), 42 states have internal predecessors, (132), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) Word has length 151 [2021-12-17 00:58:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:03,974 INFO L225 Difference]: With dead ends: 354 [2021-12-17 00:58:03,974 INFO L226 Difference]: Without dead ends: 352 [2021-12-17 00:58:03,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 203 SyntacticMatches, 16 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=292, Invalid=3612, Unknown=2, NotChecked=0, Total=3906 [2021-12-17 00:58:03,975 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 84 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:03,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1041 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1428 Invalid, 0 Unknown, 170 Unchecked, 0.5s Time] [2021-12-17 00:58:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-17 00:58:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 340. [2021-12-17 00:58:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 309 states have (on average 1.0323624595469256) internal successors, (319), 309 states have internal predecessors, (319), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 355 transitions. [2021-12-17 00:58:04,027 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 355 transitions. Word has length 151 [2021-12-17 00:58:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:04,027 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 355 transitions. [2021-12-17 00:58:04,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.933333333333333) internal successors, (132), 42 states have internal predecessors, (132), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-12-17 00:58:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 355 transitions. [2021-12-17 00:58:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-17 00:58:04,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:04,029 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:04,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:04,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-17 00:58:04,235 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1897314831, now seen corresponding path program 33 times [2021-12-17 00:58:04,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963699451] [2021-12-17 00:58:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:04,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-17 00:58:04,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:04,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963699451] [2021-12-17 00:58:04,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963699451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795358382] [2021-12-17 00:58:04,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:58:04,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:04,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:04,733 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:04,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 00:58:05,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-17 00:58:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:05,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 00:58:05,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:05,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:58:07,984 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:58:07,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:58:08,382 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 7 [2021-12-17 00:58:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 82 proven. 512 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-17 00:58:08,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:08,612 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 20 treesize of output 18 [2021-12-17 00:58:08,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:58:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-17 00:58:08,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795358382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:58:08,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:58:08,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 60 [2021-12-17 00:58:08,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775543700] [2021-12-17 00:58:08,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:08,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 00:58:08,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 00:58:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3316, Unknown=1, NotChecked=0, Total=3540 [2021-12-17 00:58:09,000 INFO L87 Difference]: Start difference. First operand 340 states and 355 transitions. Second operand has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2021-12-17 00:58:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:10,147 INFO L93 Difference]: Finished difference Result 356 states and 369 transitions. [2021-12-17 00:58:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 00:58:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 155 [2021-12-17 00:58:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:10,149 INFO L225 Difference]: With dead ends: 356 [2021-12-17 00:58:10,149 INFO L226 Difference]: Without dead ends: 354 [2021-12-17 00:58:10,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 297 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=380, Invalid=5781, Unknown=1, NotChecked=0, Total=6162 [2021-12-17 00:58:10,150 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:10,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1297 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2466 Invalid, 0 Unknown, 87 Unchecked, 0.8s Time] [2021-12-17 00:58:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-17 00:58:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 348. [2021-12-17 00:58:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 316 states have (on average 1.0316455696202531) internal successors, (326), 316 states have internal predecessors, (326), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 362 transitions. [2021-12-17 00:58:10,202 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 362 transitions. Word has length 155 [2021-12-17 00:58:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:10,203 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 362 transitions. [2021-12-17 00:58:10,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2021-12-17 00:58:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 362 transitions. [2021-12-17 00:58:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 00:58:10,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:10,204 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:10,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:10,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:10,422 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:10,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1021269893, now seen corresponding path program 34 times [2021-12-17 00:58:10,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:10,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000303996] [2021-12-17 00:58:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:10,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-17 00:58:11,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:11,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000303996] [2021-12-17 00:58:11,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000303996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:11,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130256349] [2021-12-17 00:58:11,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:58:11,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:11,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:11,124 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:11,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 00:58:11,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:58:11,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:11,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-17 00:58:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:11,839 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 [2021-12-17 00:58:12,275 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 [2021-12-17 00:58:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-17 00:58:12,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:12,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:58:12,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:58:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-17 00:58:13,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130256349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:58:13,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:58:13,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 89 [2021-12-17 00:58:13,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505041143] [2021-12-17 00:58:13,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:13,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-17 00:58:13,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-17 00:58:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=7460, Unknown=0, NotChecked=0, Total=7832 [2021-12-17 00:58:13,403 INFO L87 Difference]: Start difference. First operand 348 states and 362 transitions. Second operand has 89 states, 87 states have (on average 3.045977011494253) internal successors, (265), 83 states have internal predecessors, (265), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-17 00:58:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:16,852 INFO L93 Difference]: Finished difference Result 388 states and 405 transitions. [2021-12-17 00:58:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 00:58:16,853 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 87 states have (on average 3.045977011494253) internal successors, (265), 83 states have internal predecessors, (265), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) Word has length 159 [2021-12-17 00:58:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:16,854 INFO L225 Difference]: With dead ends: 388 [2021-12-17 00:58:16,854 INFO L226 Difference]: Without dead ends: 339 [2021-12-17 00:58:16,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 285 SyntacticMatches, 7 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6045 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1177, Invalid=19129, Unknown=0, NotChecked=0, Total=20306 [2021-12-17 00:58:16,855 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 357 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 4073 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 4401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 4073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:16,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 2115 Invalid, 4401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 4073 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 00:58:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-17 00:58:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 305. [2021-12-17 00:58:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 273 states have (on average 1.032967032967033) internal successors, (282), 273 states have internal predecessors, (282), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 318 transitions. [2021-12-17 00:58:16,919 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 318 transitions. Word has length 159 [2021-12-17 00:58:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:16,919 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 318 transitions. [2021-12-17 00:58:16,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 87 states have (on average 3.045977011494253) internal successors, (265), 83 states have internal predecessors, (265), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-17 00:58:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 318 transitions. [2021-12-17 00:58:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 00:58:16,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:16,920 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:16,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:17,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-17 00:58:17,126 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash -827326766, now seen corresponding path program 35 times [2021-12-17 00:58:17,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:17,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8470709] [2021-12-17 00:58:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:17,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:58:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 567 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-17 00:58:17,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8470709] [2021-12-17 00:58:17,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8470709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:17,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199846763] [2021-12-17 00:58:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:58:17,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:17,599 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:17,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 00:58:17,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-17 00:58:17,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:17,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-17 00:58:17,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:18,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:58:18,485 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:58:18,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:58:18,602 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:58:18,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:58:18,985 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 7 [2021-12-17 00:58:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 131 proven. 564 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-12-17 00:58:19,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:19,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:58:19,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:58:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-17 00:58:19,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199846763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:58:19,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:58:19,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2021-12-17 00:58:19,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300301902] [2021-12-17 00:58:19,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:19,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 00:58:19,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 00:58:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3430, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 00:58:19,681 INFO L87 Difference]: Start difference. First operand 305 states and 318 transitions. Second operand has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2021-12-17 00:58:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:20,840 INFO L93 Difference]: Finished difference Result 339 states and 356 transitions. [2021-12-17 00:58:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 00:58:20,840 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) Word has length 163 [2021-12-17 00:58:20,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:20,841 INFO L225 Difference]: With dead ends: 339 [2021-12-17 00:58:20,842 INFO L226 Difference]: Without dead ends: 337 [2021-12-17 00:58:20,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 312 SyntacticMatches, 17 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=6084, Unknown=0, NotChecked=0, Total=6480 [2021-12-17 00:58:20,843 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 110 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:20,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1259 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2761 Invalid, 0 Unknown, 50 Unchecked, 0.8s Time] [2021-12-17 00:58:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-17 00:58:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 317. [2021-12-17 00:58:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 285 states have (on average 1.0280701754385966) internal successors, (293), 285 states have internal predecessors, (293), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 329 transitions. [2021-12-17 00:58:20,891 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 329 transitions. Word has length 163 [2021-12-17 00:58:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:20,891 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 329 transitions. [2021-12-17 00:58:20,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2021-12-17 00:58:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 329 transitions. [2021-12-17 00:58:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 00:58:20,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:20,892 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:20,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:21,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 00:58:21,104 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash -286096696, now seen corresponding path program 36 times [2021-12-17 00:58:21,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:21,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276509033] [2021-12-17 00:58:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:21,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:58:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 39 proven. 606 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-17 00:58:21,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:21,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276509033] [2021-12-17 00:58:21,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276509033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:21,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748815511] [2021-12-17 00:58:21,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:58:21,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:21,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:21,772 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:21,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-17 00:58:22,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-17 00:58:22,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 00:58:22,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:22,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:58:22,989 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:58:22,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:58:23,443 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 [2021-12-17 00:58:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 89 proven. 606 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-17 00:58:23,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:23,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748815511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:23,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:58:23,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 65 [2021-12-17 00:58:23,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345136602] [2021-12-17 00:58:23,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:23,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 00:58:23,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 00:58:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=5654, Unknown=0, NotChecked=0, Total=6006 [2021-12-17 00:58:23,951 INFO L87 Difference]: Start difference. First operand 317 states and 329 transitions. Second operand has 65 states, 64 states have (on average 2.96875) internal successors, (190), 61 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2021-12-17 00:58:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:25,937 INFO L93 Difference]: Finished difference Result 340 states and 354 transitions. [2021-12-17 00:58:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 00:58:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.96875) internal successors, (190), 61 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 167 [2021-12-17 00:58:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:25,941 INFO L225 Difference]: With dead ends: 340 [2021-12-17 00:58:25,941 INFO L226 Difference]: Without dead ends: 338 [2021-12-17 00:58:25,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 203 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4394 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=700, Invalid=11956, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 00:58:25,942 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 108 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 3377 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 3570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:25,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1620 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3377 Invalid, 0 Unknown, 81 Unchecked, 1.0s Time] [2021-12-17 00:58:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-17 00:58:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 329. [2021-12-17 00:58:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 297 states have (on average 1.0235690235690236) internal successors, (304), 297 states have internal predecessors, (304), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 340 transitions. [2021-12-17 00:58:25,985 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 340 transitions. Word has length 167 [2021-12-17 00:58:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:25,985 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 340 transitions. [2021-12-17 00:58:25,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.96875) internal successors, (190), 61 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2021-12-17 00:58:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 340 transitions. [2021-12-17 00:58:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 00:58:25,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:25,986 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:26,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:26,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:26,199 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:26,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1640373182, now seen corresponding path program 37 times [2021-12-17 00:58:26,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:26,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941806858] [2021-12-17 00:58:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:26,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:58:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-17 00:58:26,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941806858] [2021-12-17 00:58:26,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941806858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106682909] [2021-12-17 00:58:26,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:58:26,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:26,788 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:26,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-17 00:58:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:26,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 00:58:26,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:27,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:58:27,819 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 7 [2021-12-17 00:58:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-17 00:58:27,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:27,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:58:27,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:58:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-17 00:58:28,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106682909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:58:28,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:58:28,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 65 [2021-12-17 00:58:28,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591467847] [2021-12-17 00:58:28,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:28,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 00:58:28,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:28,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 00:58:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3940, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 00:58:28,732 INFO L87 Difference]: Start difference. First operand 329 states and 340 transitions. Second operand has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 60 states have internal predecessors, (198), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (30), 30 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-17 00:58:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:31,298 INFO L93 Difference]: Finished difference Result 349 states and 360 transitions. [2021-12-17 00:58:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 00:58:31,298 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 60 states have internal predecessors, (198), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (30), 30 states have call predecessors, (30), 27 states have call successors, (30) Word has length 171 [2021-12-17 00:58:31,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:31,299 INFO L225 Difference]: With dead ends: 349 [2021-12-17 00:58:31,299 INFO L226 Difference]: Without dead ends: 296 [2021-12-17 00:58:31,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 328 SyntacticMatches, 14 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=668, Invalid=10888, Unknown=0, NotChecked=0, Total=11556 [2021-12-17 00:58:31,301 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 262 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 3973 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 4221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:31,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 1813 Invalid, 4221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3973 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 00:58:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-17 00:58:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 282. [2021-12-17 00:58:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 250 states have (on average 1.024) internal successors, (256), 250 states have internal predecessors, (256), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 292 transitions. [2021-12-17 00:58:31,341 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 292 transitions. Word has length 171 [2021-12-17 00:58:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:31,341 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 292 transitions. [2021-12-17 00:58:31,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 60 states have internal predecessors, (198), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (30), 30 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-17 00:58:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 292 transitions. [2021-12-17 00:58:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 00:58:31,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:31,343 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:31,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:31,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-17 00:58:31,555 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash -38045055, now seen corresponding path program 38 times [2021-12-17 00:58:31,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:31,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112339144] [2021-12-17 00:58:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:31,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:58:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:58:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-17 00:58:32,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:32,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112339144] [2021-12-17 00:58:32,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112339144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:32,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697789775] [2021-12-17 00:58:32,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:58:32,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:32,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:32,090 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:32,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-17 00:58:32,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:58:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:32,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 00:58:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:32,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:58:35,205 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:58:35,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:58:35,717 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 7 [2021-12-17 00:58:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 96 proven. 708 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-17 00:58:35,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:35,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:58:35,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:58:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-17 00:58:36,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697789775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:58:36,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:58:36,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 68 [2021-12-17 00:58:36,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499082090] [2021-12-17 00:58:36,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:36,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-17 00:58:36,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-17 00:58:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4300, Unknown=1, NotChecked=0, Total=4556 [2021-12-17 00:58:36,431 INFO L87 Difference]: Start difference. First operand 282 states and 292 transitions. Second operand has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2021-12-17 00:58:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:37,578 INFO L93 Difference]: Finished difference Result 295 states and 304 transitions. [2021-12-17 00:58:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 00:58:37,578 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 179 [2021-12-17 00:58:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:37,579 INFO L225 Difference]: With dead ends: 295 [2021-12-17 00:58:37,580 INFO L226 Difference]: Without dead ends: 293 [2021-12-17 00:58:37,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 356 SyntacticMatches, 13 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2389 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=404, Invalid=7077, Unknown=1, NotChecked=0, Total=7482 [2021-12-17 00:58:37,581 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 105 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:37,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1040 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2613 Invalid, 0 Unknown, 105 Unchecked, 0.8s Time] [2021-12-17 00:58:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-17 00:58:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2021-12-17 00:58:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 257 states have (on average 1.0233463035019454) internal successors, (263), 257 states have internal predecessors, (263), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 299 transitions. [2021-12-17 00:58:37,629 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 299 transitions. Word has length 179 [2021-12-17 00:58:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:37,629 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 299 transitions. [2021-12-17 00:58:37,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2021-12-17 00:58:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 299 transitions. [2021-12-17 00:58:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-17 00:58:37,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:37,631 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:37,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:37,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:37,831 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1869254391, now seen corresponding path program 39 times [2021-12-17 00:58:37,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:37,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452804170] [2021-12-17 00:58:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:37,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:58:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:58:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-17 00:58:38,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452804170] [2021-12-17 00:58:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452804170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440039949] [2021-12-17 00:58:38,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:58:38,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:38,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:38,396 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:38,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-17 00:58:38,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 00:58:38,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:38,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 00:58:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:39,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:58:40,713 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 00:58:40,714 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 25 treesize of output 12 [2021-12-17 00:58:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 370 proven. 430 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-17 00:58:40,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:41,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-12-17 00:58:41,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2021-12-17 00:58:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 265 proven. 535 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-17 00:58:43,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440039949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:58:43,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:58:43,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 104 [2021-12-17 00:58:43,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89538811] [2021-12-17 00:58:43,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:43,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-17 00:58:43,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:43,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-17 00:58:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=9625, Unknown=0, NotChecked=0, Total=10712 [2021-12-17 00:58:43,062 INFO L87 Difference]: Start difference. First operand 290 states and 299 transitions. Second operand has 104 states, 104 states have (on average 2.9615384615384617) internal successors, (308), 99 states have internal predecessors, (308), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2021-12-17 00:58:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:46,315 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2021-12-17 00:58:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-17 00:58:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.9615384615384617) internal successors, (308), 99 states have internal predecessors, (308), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) Word has length 183 [2021-12-17 00:58:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:46,316 INFO L225 Difference]: With dead ends: 296 [2021-12-17 00:58:46,316 INFO L226 Difference]: Without dead ends: 239 [2021-12-17 00:58:46,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 352 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8800 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2880, Invalid=28272, Unknown=0, NotChecked=0, Total=31152 [2021-12-17 00:58:46,318 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 103 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:46,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1199 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1332 Invalid, 0 Unknown, 286 Unchecked, 0.5s Time] [2021-12-17 00:58:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-17 00:58:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-12-17 00:58:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 206 states have internal predecessors, (211), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 247 transitions. [2021-12-17 00:58:46,347 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 247 transitions. Word has length 183 [2021-12-17 00:58:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:46,347 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 247 transitions. [2021-12-17 00:58:46,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.9615384615384617) internal successors, (308), 99 states have internal predecessors, (308), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2021-12-17 00:58:46,347 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 247 transitions. [2021-12-17 00:58:46,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-17 00:58:46,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:46,348 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:46,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:46,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:46,549 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:46,549 INFO L85 PathProgramCache]: Analyzing trace with hash -443324860, now seen corresponding path program 40 times [2021-12-17 00:58:46,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:46,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290193293] [2021-12-17 00:58:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:46,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:58:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:58:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:58:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 771 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-17 00:58:47,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:47,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290193293] [2021-12-17 00:58:47,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290193293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:47,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241214262] [2021-12-17 00:58:47,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:58:47,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:47,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:47,107 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:47,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-17 00:58:47,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:58:47,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:47,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-17 00:58:47,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:48,058 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 15 treesize of output 11 [2021-12-17 00:58:48,154 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:58:48,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:58:48,272 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:58:48,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:58:48,760 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 7 [2021-12-17 00:58:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 153 proven. 768 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-12-17 00:58:48,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:49,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:58:49,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:58:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 770 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-12-17 00:58:49,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241214262] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:58:49,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:58:49,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 69 [2021-12-17 00:58:49,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589083677] [2021-12-17 00:58:49,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:49,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 00:58:49,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 00:58:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=4430, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 00:58:49,539 INFO L87 Difference]: Start difference. First operand 239 states and 247 transitions. Second operand has 69 states, 69 states have (on average 3.072463768115942) internal successors, (212), 65 states have internal predecessors, (212), 30 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 32 states have call predecessors, (33), 30 states have call successors, (33) [2021-12-17 00:58:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:50,911 INFO L93 Difference]: Finished difference Result 252 states and 259 transitions. [2021-12-17 00:58:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 00:58:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.072463768115942) internal successors, (212), 65 states have internal predecessors, (212), 30 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 32 states have call predecessors, (33), 30 states have call successors, (33) Word has length 187 [2021-12-17 00:58:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:50,912 INFO L225 Difference]: With dead ends: 252 [2021-12-17 00:58:50,912 INFO L226 Difference]: Without dead ends: 250 [2021-12-17 00:58:50,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 371 SyntacticMatches, 18 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=411, Invalid=7245, Unknown=0, NotChecked=0, Total=7656 [2021-12-17 00:58:50,913 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 134 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 3501 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 3707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:50,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1963 Invalid, 3707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3501 Invalid, 0 Unknown, 127 Unchecked, 1.1s Time] [2021-12-17 00:58:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-17 00:58:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2021-12-17 00:58:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 213 states have (on average 1.0187793427230047) internal successors, (217), 213 states have internal predecessors, (217), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 253 transitions. [2021-12-17 00:58:50,947 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 253 transitions. Word has length 187 [2021-12-17 00:58:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:50,947 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 253 transitions. [2021-12-17 00:58:50,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.072463768115942) internal successors, (212), 65 states have internal predecessors, (212), 30 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 32 states have call predecessors, (33), 30 states have call successors, (33) [2021-12-17 00:58:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 253 transitions. [2021-12-17 00:58:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 00:58:50,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:50,950 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:50,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:51,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-17 00:58:51,167 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1911496390, now seen corresponding path program 41 times [2021-12-17 00:58:51,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580812558] [2021-12-17 00:58:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:51,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:58:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:58:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:58:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-17 00:58:51,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:51,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580812558] [2021-12-17 00:58:51,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580812558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:51,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669808869] [2021-12-17 00:58:51,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:58:51,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:51,812 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:51,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-17 00:58:52,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-17 00:58:52,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-17 00:58:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:52,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:58:53,104 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:58:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:58:53,698 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 7 [2021-12-17 00:58:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 103 proven. 818 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-17 00:58:53,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:53,966 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 20 treesize of output 18 [2021-12-17 00:58:53,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:58:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-17 00:58:54,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669808869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:58:54,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:58:54,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 74 [2021-12-17 00:58:54,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720294306] [2021-12-17 00:58:54,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:54,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-17 00:58:54,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-17 00:58:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=5122, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 00:58:54,492 INFO L87 Difference]: Start difference. First operand 247 states and 253 transitions. Second operand has 74 states, 73 states have (on average 3.041095890410959) internal successors, (222), 69 states have internal predecessors, (222), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) [2021-12-17 00:58:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:56,130 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2021-12-17 00:58:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 00:58:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.041095890410959) internal successors, (222), 69 states have internal predecessors, (222), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) Word has length 191 [2021-12-17 00:58:56,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:56,131 INFO L225 Difference]: With dead ends: 255 [2021-12-17 00:58:56,131 INFO L226 Difference]: Without dead ends: 253 [2021-12-17 00:58:56,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 367 SyntacticMatches, 14 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=463, Invalid=8657, Unknown=0, NotChecked=0, Total=9120 [2021-12-17 00:58:56,132 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 109 mSDsluCounter, 1944 mSDsCounter, 0 mSdLazyCounter, 4157 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 4372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 4157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:56,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 2000 Invalid, 4372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 4157 Invalid, 0 Unknown, 115 Unchecked, 1.3s Time] [2021-12-17 00:58:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-17 00:58:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2021-12-17 00:58:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:58:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 255 transitions. [2021-12-17 00:58:56,168 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 255 transitions. Word has length 191 [2021-12-17 00:58:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:56,169 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 255 transitions. [2021-12-17 00:58:56,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.041095890410959) internal successors, (222), 69 states have internal predecessors, (222), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) [2021-12-17 00:58:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 255 transitions. [2021-12-17 00:58:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-17 00:58:56,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:56,170 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:56,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:56,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-17 00:58:56,383 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:56,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1959522608, now seen corresponding path program 42 times [2021-12-17 00:58:56,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:56,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919085736] [2021-12-17 00:58:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:56,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:58:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:58:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:58:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:58:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:58:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:58:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:58:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:58:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:58:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:58:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:58:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:58:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:58:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:58:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:58:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:58:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:58:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-17 00:58:56,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919085736] [2021-12-17 00:58:56,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919085736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377352964] [2021-12-17 00:58:56,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:58:56,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:56,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:56,969 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:58:56,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-17 00:58:58,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-17 00:58:58,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-17 00:58:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:58,947 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 15 treesize of output 11 [2021-12-17 00:59:00,223 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-17 00:59:00,224 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 21 treesize of output 10 [2021-12-17 00:59:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-17 00:59:00,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:01,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:59:01,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:59:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-17 00:59:02,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377352964] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:59:02,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:59:02,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 109 [2021-12-17 00:59:02,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289145682] [2021-12-17 00:59:02,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:02,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-17 00:59:02,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-17 00:59:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=10609, Unknown=0, NotChecked=0, Total=11772 [2021-12-17 00:59:02,436 INFO L87 Difference]: Start difference. First operand 251 states and 255 transitions. Second operand has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 104 states have internal predecessors, (329), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (48), 48 states have call predecessors, (48), 46 states have call successors, (48) [2021-12-17 00:59:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:03,651 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2021-12-17 00:59:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 00:59:03,652 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 104 states have internal predecessors, (329), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (48), 48 states have call predecessors, (48), 46 states have call successors, (48) Word has length 195 [2021-12-17 00:59:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:03,652 INFO L225 Difference]: With dead ends: 253 [2021-12-17 00:59:03,652 INFO L226 Difference]: Without dead ends: 192 [2021-12-17 00:59:03,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 348 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4531 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1214, Invalid=11442, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 00:59:03,653 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 299 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:03,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 1704 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2974 Invalid, 0 Unknown, 35 Unchecked, 1.0s Time] [2021-12-17 00:59:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-17 00:59:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-12-17 00:59:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:59:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2021-12-17 00:59:03,678 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 195 [2021-12-17 00:59:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:03,679 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2021-12-17 00:59:03,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 104 states have internal predecessors, (329), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (48), 48 states have call predecessors, (48), 46 states have call successors, (48) [2021-12-17 00:59:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2021-12-17 00:59:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-17 00:59:03,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:03,680 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:03,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:03,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-17 00:59:03,887 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1613643901, now seen corresponding path program 43 times [2021-12-17 00:59:03,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:03,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207627157] [2021-12-17 00:59:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:03,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:59:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:59:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:59:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:59:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:59:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:59:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:59:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:59:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:59:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:59:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:59:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:59:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:59:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:59:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:59:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:59:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:59:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 00:59:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 885 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-12-17 00:59:04,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:04,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207627157] [2021-12-17 00:59:04,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207627157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:04,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068635783] [2021-12-17 00:59:04,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:59:04,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:04,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:04,555 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:04,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-17 00:59:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-17 00:59:04,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:05,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:59:05,652 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:59:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:59:05,790 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 00:59:05,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 00:59:06,350 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 7 [2021-12-17 00:59:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 164 proven. 882 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-17 00:59:06,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:06,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:59:06,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:59:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 884 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-12-17 00:59:07,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068635783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:59:07,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:59:07,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 75 [2021-12-17 00:59:07,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154901152] [2021-12-17 00:59:07,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:07,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 00:59:07,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 00:59:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5263, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 00:59:07,221 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand has 75 states, 74 states have (on average 3.0675675675675675) internal successors, (227), 70 states have internal predecessors, (227), 33 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (36), 35 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-17 00:59:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:08,997 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2021-12-17 00:59:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 00:59:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.0675675675675675) internal successors, (227), 70 states have internal predecessors, (227), 33 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (36), 35 states have call predecessors, (36), 33 states have call successors, (36) Word has length 199 [2021-12-17 00:59:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:08,999 INFO L225 Difference]: With dead ends: 206 [2021-12-17 00:59:08,999 INFO L226 Difference]: Without dead ends: 204 [2021-12-17 00:59:08,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 382 SyntacticMatches, 18 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=479, Invalid=9027, Unknown=0, NotChecked=0, Total=9506 [2021-12-17 00:59:09,000 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 152 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 4555 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 4797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 4555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:09,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 2048 Invalid, 4797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 4555 Invalid, 0 Unknown, 95 Unchecked, 1.4s Time] [2021-12-17 00:59:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-17 00:59:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 196. [2021-12-17 00:59:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 00:59:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2021-12-17 00:59:09,021 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 199 [2021-12-17 00:59:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:09,021 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2021-12-17 00:59:09,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.0675675675675675) internal successors, (227), 70 states have internal predecessors, (227), 33 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (36), 35 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-17 00:59:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2021-12-17 00:59:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-17 00:59:09,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:09,023 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:09,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:09,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:09,227 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash 785512179, now seen corresponding path program 44 times [2021-12-17 00:59:09,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:09,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050440549] [2021-12-17 00:59:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:09,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:59:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:59:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:59:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:59:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:59:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:59:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:59:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:59:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:59:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:59:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:59:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:59:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:59:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:59:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:59:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:59:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:59:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 00:59:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-12-17 00:59:09,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050440549] [2021-12-17 00:59:09,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050440549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366182540] [2021-12-17 00:59:09,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:59:09,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:09,941 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:09,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-17 00:59:10,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:59:10,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-17 00:59:10,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:10,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:59:12,874 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:59:12,875 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 [2021-12-17 00:59:13,452 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 9 [2021-12-17 00:59:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 110 proven. 936 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-17 00:59:13,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:13,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366182540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:13,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:59:13,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 58 [2021-12-17 00:59:13,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070581039] [2021-12-17 00:59:13,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:13,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-17 00:59:13,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:13,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-17 00:59:13,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3326, Unknown=1, NotChecked=0, Total=3540 [2021-12-17 00:59:13,701 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 58 states, 58 states have (on average 3.1206896551724137) internal successors, (181), 55 states have internal predecessors, (181), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2021-12-17 00:59:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:15,336 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2021-12-17 00:59:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 00:59:15,336 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.1206896551724137) internal successors, (181), 55 states have internal predecessors, (181), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) Word has length 203 [2021-12-17 00:59:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:15,337 INFO L225 Difference]: With dead ends: 268 [2021-12-17 00:59:15,337 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 00:59:15,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 284 SyntacticMatches, 14 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=375, Invalid=6104, Unknown=1, NotChecked=0, Total=6480 [2021-12-17 00:59:15,338 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 107 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 3879 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 4048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:15,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1757 Invalid, 4048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3879 Invalid, 0 Unknown, 129 Unchecked, 1.3s Time] [2021-12-17 00:59:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 00:59:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2021-12-17 00:59:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 00:59:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 213 transitions. [2021-12-17 00:59:15,360 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 213 transitions. Word has length 203 [2021-12-17 00:59:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:15,361 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 213 transitions. [2021-12-17 00:59:15,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.1206896551724137) internal successors, (181), 55 states have internal predecessors, (181), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2021-12-17 00:59:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 213 transitions. [2021-12-17 00:59:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-17 00:59:15,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:15,362 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:15,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:15,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-17 00:59:15,569 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash -14056855, now seen corresponding path program 45 times [2021-12-17 00:59:15,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981405351] [2021-12-17 00:59:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:15,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:59:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:59:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:59:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:59:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:59:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:59:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:59:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:59:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:59:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:59:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:59:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:59:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:59:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:59:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:59:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:59:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:59:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 00:59:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 51 proven. 991 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-12-17 00:59:16,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:16,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981405351] [2021-12-17 00:59:16,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981405351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:16,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954385483] [2021-12-17 00:59:16,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:59:16,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:16,241 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:16,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-17 00:59:16,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-17 00:59:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-17 00:59:16,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:17,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:59:19,280 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-17 00:59:19,280 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 21 treesize of output 10 [2021-12-17 00:59:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 51 proven. 991 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-12-17 00:59:19,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:20,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:59:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:59:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 51 proven. 991 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-12-17 00:59:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954385483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:59:21,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:59:21,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 115 [2021-12-17 00:59:21,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285924437] [2021-12-17 00:59:21,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:21,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-17 00:59:21,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-17 00:59:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1276, Invalid=11834, Unknown=0, NotChecked=0, Total=13110 [2021-12-17 00:59:21,716 INFO L87 Difference]: Start difference. First operand 209 states and 213 transitions. Second operand has 115 states, 115 states have (on average 3.0434782608695654) internal successors, (350), 110 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2021-12-17 00:59:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:25,200 INFO L93 Difference]: Finished difference Result 332 states and 351 transitions. [2021-12-17 00:59:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-17 00:59:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.0434782608695654) internal successors, (350), 110 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) Word has length 207 [2021-12-17 00:59:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:25,201 INFO L225 Difference]: With dead ends: 332 [2021-12-17 00:59:25,201 INFO L226 Difference]: Without dead ends: 330 [2021-12-17 00:59:25,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 381 SyntacticMatches, 6 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9072 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2397, Invalid=23685, Unknown=0, NotChecked=0, Total=26082 [2021-12-17 00:59:25,203 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 429 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 3534 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 3988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 3534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:25,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 1748 Invalid, 3988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 3534 Invalid, 0 Unknown, 257 Unchecked, 1.3s Time] [2021-12-17 00:59:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-17 00:59:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 273. [2021-12-17 00:59:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 00:59:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 277 transitions. [2021-12-17 00:59:25,237 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 277 transitions. Word has length 207 [2021-12-17 00:59:25,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:25,237 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 277 transitions. [2021-12-17 00:59:25,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.0434782608695654) internal successors, (350), 110 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2021-12-17 00:59:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 277 transitions. [2021-12-17 00:59:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-17 00:59:25,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:25,239 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:25,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:25,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-17 00:59:25,457 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:25,457 INFO L85 PathProgramCache]: Analyzing trace with hash -920417866, now seen corresponding path program 46 times [2021-12-17 00:59:25,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:25,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975273499] [2021-12-17 00:59:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:25,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:59:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:59:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:59:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:59:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:59:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:59:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:59:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:59:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:59:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:59:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:59:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:59:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:59:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:59:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:59:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:59:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:59:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 00:59:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 00:59:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1007 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-17 00:59:26,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975273499] [2021-12-17 00:59:26,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975273499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371455661] [2021-12-17 00:59:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:59:26,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:26,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:26,224 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:26,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-17 00:59:26,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:59:26,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:26,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 00:59:26,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:59:29,226 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:59:29,227 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 [2021-12-17 00:59:31,435 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:59:31,435 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 [2021-12-17 00:59:32,029 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 25 treesize of output 9 [2021-12-17 00:59:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 175 proven. 1004 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-12-17 00:59:32,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:32,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371455661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:32,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:59:32,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2021-12-17 00:59:32,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872938696] [2021-12-17 00:59:32,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:32,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 00:59:32,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 00:59:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3554, Unknown=1, NotChecked=0, Total=3782 [2021-12-17 00:59:32,270 INFO L87 Difference]: Start difference. First operand 273 states and 277 transitions. Second operand has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 57 states have internal predecessors, (187), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-17 00:59:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:33,618 INFO L93 Difference]: Finished difference Result 336 states and 340 transitions. [2021-12-17 00:59:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 00:59:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 57 states have internal predecessors, (187), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) Word has length 211 [2021-12-17 00:59:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:33,620 INFO L225 Difference]: With dead ends: 336 [2021-12-17 00:59:33,620 INFO L226 Difference]: Without dead ends: 334 [2021-12-17 00:59:33,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 293 SyntacticMatches, 16 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=382, Invalid=6259, Unknown=1, NotChecked=0, Total=6642 [2021-12-17 00:59:33,621 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 117 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 2864 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:33,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1301 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2864 Invalid, 0 Unknown, 209 Unchecked, 1.0s Time] [2021-12-17 00:59:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-17 00:59:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 273. [2021-12-17 00:59:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 00:59:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 277 transitions. [2021-12-17 00:59:33,657 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 277 transitions. Word has length 211 [2021-12-17 00:59:33,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:33,657 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 277 transitions. [2021-12-17 00:59:33,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 57 states have internal predecessors, (187), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-17 00:59:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 277 transitions. [2021-12-17 00:59:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-17 00:59:33,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:33,658 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:33,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:33,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:33,859 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:33,859 INFO L85 PathProgramCache]: Analyzing trace with hash 488504236, now seen corresponding path program 47 times [2021-12-17 00:59:33,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:33,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76173421] [2021-12-17 00:59:33,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:33,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:59:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:59:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:59:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:59:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:59:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:59:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:59:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:59:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:59:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:59:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:59:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:59:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:59:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:59:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:59:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:59:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:59:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 00:59:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 00:59:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-17 00:59:34,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76173421] [2021-12-17 00:59:34,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76173421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767974061] [2021-12-17 00:59:34,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:59:34,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:34,551 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:34,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-17 00:59:34,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-17 00:59:34,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:34,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-17 00:59:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:35,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:59:40,027 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 00:59:40,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 00:59:40,744 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 7 [2021-12-17 00:59:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 117 proven. 1062 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-12-17 00:59:40,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:41,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 00:59:41,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 00:59:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-17 00:59:41,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767974061] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:59:41,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:59:41,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 80 [2021-12-17 00:59:41,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558816767] [2021-12-17 00:59:41,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:41,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-17 00:59:41,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-17 00:59:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=6015, Unknown=2, NotChecked=0, Total=6320 [2021-12-17 00:59:41,565 INFO L87 Difference]: Start difference. First operand 273 states and 277 transitions. Second operand has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2021-12-17 00:59:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:43,477 INFO L93 Difference]: Finished difference Result 358 states and 363 transitions. [2021-12-17 00:59:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-17 00:59:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) Word has length 215 [2021-12-17 00:59:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:43,478 INFO L225 Difference]: With dead ends: 358 [2021-12-17 00:59:43,478 INFO L226 Difference]: Without dead ends: 356 [2021-12-17 00:59:43,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 417 SyntacticMatches, 13 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3476 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=510, Invalid=10408, Unknown=2, NotChecked=0, Total=10920 [2021-12-17 00:59:43,481 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 121 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 4904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:43,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1712 Invalid, 4904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 4588 Invalid, 0 Unknown, 205 Unchecked, 1.4s Time] [2021-12-17 00:59:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-17 00:59:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 282. [2021-12-17 00:59:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 243 states have internal predecessors, (247), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 00:59:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2021-12-17 00:59:43,531 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 215 [2021-12-17 00:59:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:43,532 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2021-12-17 00:59:43,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2021-12-17 00:59:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2021-12-17 00:59:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-17 00:59:43,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:43,533 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:43,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:43,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-17 00:59:43,753 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash 704807586, now seen corresponding path program 48 times [2021-12-17 00:59:43,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:43,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442241498] [2021-12-17 00:59:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:43,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:59:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:59:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:59:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:59:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:59:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:59:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:59:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:59:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:59:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:59:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:59:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:59:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:59:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:59:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:59:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:59:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:59:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 00:59:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 00:59:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 54 proven. 1121 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-17 00:59:44,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:44,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442241498] [2021-12-17 00:59:44,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442241498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:44,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520914206] [2021-12-17 00:59:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:59:44,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:44,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:44,463 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:44,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-17 00:59:45,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 00:59:45,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-17 00:59:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:46,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:59:47,872 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-17 00:59:47,872 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 21 treesize of output 10 [2021-12-17 00:59:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 54 proven. 1121 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-17 00:59:47,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:49,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 00:59:49,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 00:59:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 54 proven. 1121 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-17 00:59:50,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520914206] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:59:50,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:59:50,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 121 [2021-12-17 00:59:50,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790692702] [2021-12-17 00:59:50,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:50,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-12-17 00:59:50,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-12-17 00:59:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1394, Invalid=13126, Unknown=0, NotChecked=0, Total=14520 [2021-12-17 00:59:50,515 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand has 121 states, 121 states have (on average 3.0661157024793386) internal successors, (371), 116 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2021-12-17 00:59:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:58,023 INFO L93 Difference]: Finished difference Result 481 states and 502 transitions. [2021-12-17 00:59:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-12-17 00:59:58,023 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.0661157024793386) internal successors, (371), 116 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) Word has length 219 [2021-12-17 00:59:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:58,024 INFO L225 Difference]: With dead ends: 481 [2021-12-17 00:59:58,024 INFO L226 Difference]: Without dead ends: 479 [2021-12-17 00:59:58,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 407 SyntacticMatches, 6 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18155 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=4627, Invalid=48043, Unknown=0, NotChecked=0, Total=52670 [2021-12-17 00:59:58,027 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 385 mSDsluCounter, 3218 mSDsCounter, 0 mSdLazyCounter, 4735 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 3315 SdHoareTripleChecker+Invalid, 6892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 4735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1835 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:58,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 3315 Invalid, 6892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 4735 Invalid, 0 Unknown, 1835 Unchecked, 1.8s Time] [2021-12-17 00:59:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-17 00:59:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 290. [2021-12-17 00:59:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 251 states have (on average 1.0159362549800797) internal successors, (255), 251 states have internal predecessors, (255), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 00:59:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 295 transitions. [2021-12-17 00:59:58,073 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 295 transitions. Word has length 219 [2021-12-17 00:59:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:58,073 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 295 transitions. [2021-12-17 00:59:58,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.0661157024793386) internal successors, (371), 116 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2021-12-17 00:59:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 295 transitions. [2021-12-17 00:59:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-17 00:59:58,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:58,074 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:58,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:58,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:58,292 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:58,293 INFO L85 PathProgramCache]: Analyzing trace with hash 762479087, now seen corresponding path program 49 times [2021-12-17 00:59:58,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:58,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106786980] [2021-12-17 00:59:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:58,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:59:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 00:59:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 00:59:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 00:59:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 00:59:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 00:59:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 00:59:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 00:59:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 00:59:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 00:59:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 00:59:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:58,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 00:59:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 00:59:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 00:59:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 00:59:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 00:59:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 00:59:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 00:59:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 00:59:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 00:59:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1137 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-12-17 00:59:59,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:59,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106786980] [2021-12-17 00:59:59,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106786980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:59,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116441026] [2021-12-17 00:59:59,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:59:59,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:59,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:59,016 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:59,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-17 00:59:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:59:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-17 00:59:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:00:00,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:00:00,332 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:00:00,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:00:00,465 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:00:00,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:00:01,151 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 7 [2021-12-17 01:00:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 186 proven. 1134 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-12-17 01:00:01,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:00:01,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:00:01,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:00:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1136 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2021-12-17 01:00:02,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116441026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:00:02,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:00:02,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 81 [2021-12-17 01:00:02,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351396202] [2021-12-17 01:00:02,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:00:02,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-17 01:00:02,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:00:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-17 01:00:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=6170, Unknown=0, NotChecked=0, Total=6480 [2021-12-17 01:00:02,055 INFO L87 Difference]: Start difference. First operand 290 states and 295 transitions. Second operand has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) [2021-12-17 01:00:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:00:05,398 INFO L93 Difference]: Finished difference Result 490 states and 495 transitions. [2021-12-17 01:00:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-17 01:00:05,398 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) Word has length 223 [2021-12-17 01:00:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:00:05,400 INFO L225 Difference]: With dead ends: 490 [2021-12-17 01:00:05,400 INFO L226 Difference]: Without dead ends: 488 [2021-12-17 01:00:05,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 432 SyntacticMatches, 17 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6385 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=974, Invalid=19048, Unknown=0, NotChecked=0, Total=20022 [2021-12-17 01:00:05,401 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 271 mSDsluCounter, 3103 mSDsCounter, 0 mSdLazyCounter, 6602 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 6989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 6602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:00:05,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 3174 Invalid, 6989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 6602 Invalid, 0 Unknown, 106 Unchecked, 2.1s Time] [2021-12-17 01:00:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-12-17 01:00:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 290. [2021-12-17 01:00:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 251 states have (on average 1.0159362549800797) internal successors, (255), 251 states have internal predecessors, (255), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 01:00:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 295 transitions. [2021-12-17 01:00:05,460 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 295 transitions. Word has length 223 [2021-12-17 01:00:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:00:05,460 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 295 transitions. [2021-12-17 01:00:05,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) [2021-12-17 01:00:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 295 transitions. [2021-12-17 01:00:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-17 01:00:05,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:00:05,462 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:00:05,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-17 01:00:05,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-17 01:00:05,675 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:00:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:00:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1414803301, now seen corresponding path program 50 times [2021-12-17 01:00:05,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:00:05,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053144944] [2021-12-17 01:00:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:00:05,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:00:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:00:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:00:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:00:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:00:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:00:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:00:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:00:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:00:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:00:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:00:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:00:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:00:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:00:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:00:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:00:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:00:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:00:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:00:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:00:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:00:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 54 proven. 1196 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-12-17 01:00:06,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:00:06,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053144944] [2021-12-17 01:00:06,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053144944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:00:06,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580647348] [2021-12-17 01:00:06,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:00:06,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:00:06,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:00:06,473 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:00:06,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-17 01:00:06,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:00:06,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:00:06,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-17 01:00:06,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:00:07,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:00:09,978 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-17 01:00:09,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-17 01:00:10,769 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 7 [2021-12-17 01:00:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 124 proven. 1196 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-17 01:00:10,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:00:11,073 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 [2021-12-17 01:00:11,077 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 39 treesize of output 35 [2021-12-17 01:00:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 54 proven. 1196 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-12-17 01:00:11,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580647348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:00:11,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:00:11,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 86 [2021-12-17 01:00:11,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986674791] [2021-12-17 01:00:11,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:00:11,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 01:00:11,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:00:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 01:00:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=6966, Unknown=1, NotChecked=0, Total=7310 [2021-12-17 01:00:11,799 INFO L87 Difference]: Start difference. First operand 290 states and 295 transitions. Second operand has 86 states, 85 states have (on average 3.1058823529411765) internal successors, (264), 81 states have internal predecessors, (264), 38 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-17 01:00:16,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:00:16,691 INFO L93 Difference]: Finished difference Result 600 states and 611 transitions. [2021-12-17 01:00:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-17 01:00:16,692 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 3.1058823529411765) internal successors, (264), 81 states have internal predecessors, (264), 38 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) Word has length 227 [2021-12-17 01:00:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:00:16,693 INFO L225 Difference]: With dead ends: 600 [2021-12-17 01:00:16,693 INFO L226 Difference]: Without dead ends: 598 [2021-12-17 01:00:16,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 442 SyntacticMatches, 14 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9640 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1665, Invalid=28784, Unknown=1, NotChecked=0, Total=30450 [2021-12-17 01:00:16,695 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 412 mSDsluCounter, 4959 mSDsCounter, 0 mSdLazyCounter, 8242 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 5064 SdHoareTripleChecker+Invalid, 8752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 8242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 01:00:16,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 5064 Invalid, 8752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 8242 Invalid, 0 Unknown, 123 Unchecked, 2.7s Time] [2021-12-17 01:00:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-12-17 01:00:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 307. [2021-12-17 01:00:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 264 states have (on average 1.0265151515151516) internal successors, (271), 264 states have internal predecessors, (271), 23 states have call successors, (23), 19 states have call predecessors, (23), 19 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:00:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 317 transitions. [2021-12-17 01:00:16,752 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 317 transitions. Word has length 227 [2021-12-17 01:00:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:00:16,753 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 317 transitions. [2021-12-17 01:00:16,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 3.1058823529411765) internal successors, (264), 81 states have internal predecessors, (264), 38 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-17 01:00:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 317 transitions. [2021-12-17 01:00:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-17 01:00:16,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:00:16,754 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:00:16,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-17 01:00:16,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-17 01:00:16,959 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:00:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:00:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1357499941, now seen corresponding path program 51 times [2021-12-17 01:00:16,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:00:16,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616120429] [2021-12-17 01:00:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:00:16,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:00:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:00:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:00:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:00:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:00:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:00:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:00:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:00:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:00:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:00:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:00:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:00:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:00:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:00:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:00:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:00:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:00:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:00:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:00:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:00:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:00:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 57 proven. 1259 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-12-17 01:00:17,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:00:17,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616120429] [2021-12-17 01:00:17,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616120429] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:00:17,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647889353] [2021-12-17 01:00:17,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:00:17,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:00:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:00:17,856 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:00:17,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-17 01:00:19,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-17 01:00:19,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:00:19,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-17 01:00:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:00:20,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:00:22,299 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-17 01:00:22,299 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 21 treesize of output 10 [2021-12-17 01:00:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 57 proven. 1259 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-12-17 01:00:22,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:00:23,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 01:00:23,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 01:00:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 57 proven. 1259 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-12-17 01:00:25,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647889353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:00:25,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:00:25,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 127 [2021-12-17 01:00:25,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942943847] [2021-12-17 01:00:25,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:00:25,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-17 01:00:25,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:00:25,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-17 01:00:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=14485, Unknown=0, NotChecked=0, Total=16002 [2021-12-17 01:00:25,238 INFO L87 Difference]: Start difference. First operand 307 states and 317 transitions. Second operand has 127 states, 127 states have (on average 3.0866141732283463) internal successors, (392), 122 states have internal predecessors, (392), 55 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) [2021-12-17 01:00:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:00:35,232 INFO L93 Difference]: Finished difference Result 597 states and 624 transitions. [2021-12-17 01:00:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-12-17 01:00:35,232 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.0866141732283463) internal successors, (392), 122 states have internal predecessors, (392), 55 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) Word has length 231 [2021-12-17 01:00:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:00:35,233 INFO L225 Difference]: With dead ends: 597 [2021-12-17 01:00:35,233 INFO L226 Difference]: Without dead ends: 595 [2021-12-17 01:00:35,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 427 SyntacticMatches, 6 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21925 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4658, Invalid=61134, Unknown=0, NotChecked=0, Total=65792 [2021-12-17 01:00:35,237 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 807 mSDsluCounter, 4646 mSDsCounter, 0 mSdLazyCounter, 6556 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 4749 SdHoareTripleChecker+Invalid, 8286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 6556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1092 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 01:00:35,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 4749 Invalid, 8286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 6556 Invalid, 0 Unknown, 1092 Unchecked, 2.6s Time] [2021-12-17 01:00:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-17 01:00:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 316. [2021-12-17 01:00:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 273 states have (on average 1.0256410256410255) internal successors, (280), 273 states have internal predecessors, (280), 23 states have call successors, (23), 19 states have call predecessors, (23), 19 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:00:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 326 transitions. [2021-12-17 01:00:35,299 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 326 transitions. Word has length 231 [2021-12-17 01:00:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:00:35,300 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 326 transitions. [2021-12-17 01:00:35,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.0866141732283463) internal successors, (392), 122 states have internal predecessors, (392), 55 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) [2021-12-17 01:00:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 326 transitions. [2021-12-17 01:00:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-17 01:00:35,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:00:35,301 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:00:35,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-17 01:00:35,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:00:35,519 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:00:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:00:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1642868194, now seen corresponding path program 52 times [2021-12-17 01:00:35,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:00:35,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236728228] [2021-12-17 01:00:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:00:35,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:00:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:00:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:00:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:00:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:00:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:00:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:00:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:00:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:00:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:00:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:00:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:00:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:00:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:00:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:00:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:00:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:00:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:00:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:00:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:00:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:00:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:00:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 57 proven. 1338 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-17 01:00:36,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:00:36,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236728228] [2021-12-17 01:00:36,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236728228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:00:36,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837091069] [2021-12-17 01:00:36,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:00:36,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:00:36,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:00:36,463 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:00:36,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-17 01:00:36,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:00:36,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:00:36,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-17 01:00:36,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:00:37,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:00:39,887 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:00:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:00:40,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-17 01:00:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 131 proven. 1338 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-12-17 01:00:40,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:00:40,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837091069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:00:40,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:00:40,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 67 [2021-12-17 01:00:40,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615870407] [2021-12-17 01:00:40,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:00:40,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-17 01:00:40,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:00:40,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-17 01:00:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4445, Unknown=1, NotChecked=0, Total=4692 [2021-12-17 01:00:40,944 INFO L87 Difference]: Start difference. First operand 316 states and 326 transitions. Second operand has 67 states, 67 states have (on average 3.1940298507462686) internal successors, (214), 64 states have internal predecessors, (214), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 01:00:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:00:44,574 INFO L93 Difference]: Finished difference Result 606 states and 615 transitions. [2021-12-17 01:00:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-17 01:00:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.1940298507462686) internal successors, (214), 64 states have internal predecessors, (214), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) Word has length 239 [2021-12-17 01:00:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:00:44,576 INFO L225 Difference]: With dead ends: 606 [2021-12-17 01:00:44,576 INFO L226 Difference]: Without dead ends: 604 [2021-12-17 01:00:44,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 335 SyntacticMatches, 17 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3728 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=544, Invalid=11887, Unknown=1, NotChecked=0, Total=12432 [2021-12-17 01:00:44,577 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 200 mSDsluCounter, 4259 mSDsCounter, 0 mSdLazyCounter, 7391 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 4367 SdHoareTripleChecker+Invalid, 7695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 7391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 01:00:44,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 4367 Invalid, 7695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 7391 Invalid, 0 Unknown, 184 Unchecked, 2.6s Time] [2021-12-17 01:00:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-17 01:00:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 321. [2021-12-17 01:00:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 277 states have (on average 1.0252707581227436) internal successors, (284), 277 states have internal predecessors, (284), 23 states have call successors, (23), 20 states have call predecessors, (23), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:00:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 330 transitions. [2021-12-17 01:00:44,641 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 330 transitions. Word has length 239 [2021-12-17 01:00:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:00:44,641 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 330 transitions. [2021-12-17 01:00:44,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.1940298507462686) internal successors, (214), 64 states have internal predecessors, (214), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 01:00:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 330 transitions. [2021-12-17 01:00:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-17 01:00:44,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:00:44,642 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:00:44,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-17 01:00:44,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:00:44,859 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:00:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:00:44,860 INFO L85 PathProgramCache]: Analyzing trace with hash -161230828, now seen corresponding path program 53 times [2021-12-17 01:00:44,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:00:44,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687312500] [2021-12-17 01:00:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:00:44,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:00:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:00:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:00:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:00:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:00:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:00:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:00:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:00:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:00:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:00:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:00:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:00:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:00:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:00:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:00:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:00:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:00:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:00:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:00:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:00:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:00:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:00:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 60 proven. 1405 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-17 01:00:45,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:00:45,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687312500] [2021-12-17 01:00:45,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687312500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:00:45,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250007242] [2021-12-17 01:00:45,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:00:45,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:00:45,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:00:45,794 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:00:45,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-17 01:00:46,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-17 01:00:46,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:00:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-17 01:00:46,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:00:47,538 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 [2021-12-17 01:00:48,439 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 7 [2021-12-17 01:00:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 60 proven. 1405 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-17 01:00:48,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:00:48,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 01:00:48,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 01:00:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 60 proven. 1405 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-17 01:00:49,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250007242] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:00:49,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:00:49,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 88 [2021-12-17 01:00:49,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544297490] [2021-12-17 01:00:49,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:00:49,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-17 01:00:49,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:00:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-17 01:00:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=7360, Unknown=0, NotChecked=0, Total=7656 [2021-12-17 01:00:49,323 INFO L87 Difference]: Start difference. First operand 321 states and 330 transitions. Second operand has 88 states, 88 states have (on average 3.2045454545454546) internal successors, (282), 84 states have internal predecessors, (282), 39 states have call successors, (40), 1 states have call predecessors, (40), 2 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) [2021-12-17 01:00:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:00:54,635 INFO L93 Difference]: Finished difference Result 706 states and 715 transitions. [2021-12-17 01:00:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-17 01:00:54,636 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.2045454545454546) internal successors, (282), 84 states have internal predecessors, (282), 39 states have call successors, (40), 1 states have call predecessors, (40), 2 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) Word has length 243 [2021-12-17 01:00:54,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:00:54,637 INFO L225 Difference]: With dead ends: 706 [2021-12-17 01:00:54,637 INFO L226 Difference]: Without dead ends: 704 [2021-12-17 01:00:54,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 477 SyntacticMatches, 10 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6400 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=974, Invalid=21676, Unknown=0, NotChecked=0, Total=22650 [2021-12-17 01:00:54,639 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 229 mSDsluCounter, 6473 mSDsCounter, 0 mSdLazyCounter, 10885 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 6590 SdHoareTripleChecker+Invalid, 11093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 10885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 01:00:54,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 6590 Invalid, 11093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 10885 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 01:00:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-17 01:00:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 321. [2021-12-17 01:00:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 277 states have (on average 1.0252707581227436) internal successors, (284), 277 states have internal predecessors, (284), 23 states have call successors, (23), 20 states have call predecessors, (23), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:00:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 330 transitions. [2021-12-17 01:00:54,714 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 330 transitions. Word has length 243 [2021-12-17 01:00:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:00:54,714 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 330 transitions. [2021-12-17 01:00:54,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.2045454545454546) internal successors, (282), 84 states have internal predecessors, (282), 39 states have call successors, (40), 1 states have call predecessors, (40), 2 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) [2021-12-17 01:00:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 330 transitions. [2021-12-17 01:00:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-17 01:00:54,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:00:54,715 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 20, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:00:54,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-17 01:00:54,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:00:54,925 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:00:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:00:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash -749043871, now seen corresponding path program 54 times [2021-12-17 01:00:54,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:00:54,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256602393] [2021-12-17 01:00:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:00:54,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:00:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:00:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:00:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:00:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:00:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:00:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:00:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:00:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:00:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:00:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:00:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:00:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:00:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:00:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:00:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:00:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:00:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:00:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:00:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:00:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:00:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:00:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:00:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:00:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 57 proven. 1421 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 01:00:55,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:00:55,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256602393] [2021-12-17 01:00:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256602393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:00:55,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41807677] [2021-12-17 01:00:55,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:00:55,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:00:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:00:55,782 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:00:55,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-17 01:00:56,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-17 01:00:56,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:00:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-17 01:00:56,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:00:57,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:00:58,302 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-17 01:00:58,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-17 01:00:58,740 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-17 01:00:58,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-17 01:00:59,596 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 7 [2021-12-17 01:00:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 205 proven. 1421 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-12-17 01:00:59,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:00:59,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:00:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:01:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 57 proven. 1420 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-12-17 01:01:00,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41807677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:01:00,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:01:00,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 90 [2021-12-17 01:01:00,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719046451] [2021-12-17 01:01:00,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:01:00,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-17 01:01:00,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:01:00,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-17 01:01:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=7661, Unknown=0, NotChecked=0, Total=8010 [2021-12-17 01:01:00,592 INFO L87 Difference]: Start difference. First operand 321 states and 330 transitions. Second operand has 90 states, 90 states have (on average 3.1666666666666665) internal successors, (285), 86 states have internal predecessors, (285), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2021-12-17 01:01:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:01:06,021 INFO L93 Difference]: Finished difference Result 761 states and 769 transitions. [2021-12-17 01:01:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-17 01:01:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.1666666666666665) internal successors, (285), 86 states have internal predecessors, (285), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) Word has length 247 [2021-12-17 01:01:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:01:06,024 INFO L225 Difference]: With dead ends: 761 [2021-12-17 01:01:06,024 INFO L226 Difference]: Without dead ends: 759 [2021-12-17 01:01:06,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 509 SyntacticMatches, 19 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10080 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1275, Invalid=29525, Unknown=0, NotChecked=0, Total=30800 [2021-12-17 01:01:06,026 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 322 mSDsluCounter, 6559 mSDsCounter, 0 mSdLazyCounter, 10383 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 6675 SdHoareTripleChecker+Invalid, 10772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 10383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 01:01:06,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 6675 Invalid, 10772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 10383 Invalid, 0 Unknown, 195 Unchecked, 3.3s Time] [2021-12-17 01:01:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-17 01:01:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 391. [2021-12-17 01:01:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 346 states have (on average 1.023121387283237) internal successors, (354), 346 states have internal predecessors, (354), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:01:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 400 transitions. [2021-12-17 01:01:06,128 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 400 transitions. Word has length 247 [2021-12-17 01:01:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:01:06,128 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 400 transitions. [2021-12-17 01:01:06,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.1666666666666665) internal successors, (285), 86 states have internal predecessors, (285), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2021-12-17 01:01:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 400 transitions. [2021-12-17 01:01:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-17 01:01:06,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:01:06,130 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:01:06,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-17 01:01:06,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-17 01:01:06,342 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:01:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:01:06,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1980243190, now seen corresponding path program 55 times [2021-12-17 01:01:06,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:01:06,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392785403] [2021-12-17 01:01:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:01:06,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:01:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:01:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:01:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:01:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:01:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:01:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:01:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:01:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:01:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:01:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:01:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:01:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:01:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:01:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:01:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:01:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:01:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:01:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:01:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:01:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:01:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:01:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 649 proven. 776 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-17 01:01:06,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:01:06,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392785403] [2021-12-17 01:01:06,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392785403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:06,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478215096] [2021-12-17 01:01:06,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:01:06,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:06,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:01:06,852 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:01:06,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-17 01:01:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:07,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 01:01:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:01:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-17 01:01:07,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:01:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-17 01:01:08,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478215096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:01:08,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:01:08,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2021-12-17 01:01:08,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158564120] [2021-12-17 01:01:08,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:01:08,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 01:01:08,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:01:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 01:01:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 01:01:08,354 INFO L87 Difference]: Start difference. First operand 391 states and 400 transitions. Second operand has 65 states, 65 states have (on average 3.5692307692307694) internal successors, (232), 65 states have internal predecessors, (232), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-17 01:01:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:01:09,848 INFO L93 Difference]: Finished difference Result 694 states and 702 transitions. [2021-12-17 01:01:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-17 01:01:09,848 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.5692307692307694) internal successors, (232), 65 states have internal predecessors, (232), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 247 [2021-12-17 01:01:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:01:09,849 INFO L225 Difference]: With dead ends: 694 [2021-12-17 01:01:09,849 INFO L226 Difference]: Without dead ends: 335 [2021-12-17 01:01:09,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5607 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3779, Invalid=16243, Unknown=0, NotChecked=0, Total=20022 [2021-12-17 01:01:09,852 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 999 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:01:09,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 657 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 01:01:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-17 01:01:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 319. [2021-12-17 01:01:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 274 states have internal predecessors, (278), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:01:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 324 transitions. [2021-12-17 01:01:09,922 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 324 transitions. Word has length 247 [2021-12-17 01:01:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:01:09,923 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 324 transitions. [2021-12-17 01:01:09,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.5692307692307694) internal successors, (232), 65 states have internal predecessors, (232), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-17 01:01:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 324 transitions. [2021-12-17 01:01:09,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-17 01:01:09,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:01:09,924 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 21, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:01:09,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-17 01:01:10,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-17 01:01:10,132 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:01:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:01:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash 789611438, now seen corresponding path program 56 times [2021-12-17 01:01:10,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:01:10,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656118099] [2021-12-17 01:01:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:01:10,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:01:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:01:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:01:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:01:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:01:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:01:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:01:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:01:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:01:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:01:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:01:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:01:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:01:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:01:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:01:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:01:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:01:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:01:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:01:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:01:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:01:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:01:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:01:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:01:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 66 proven. 1433 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-12-17 01:01:10,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:01:10,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656118099] [2021-12-17 01:01:10,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656118099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:10,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312027150] [2021-12-17 01:01:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:01:10,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:10,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:01:10,984 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:01:10,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-17 01:01:11,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:01:11,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:01:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-17 01:01:11,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:01:12,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:01:12,424 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:01:12,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:01:12,513 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:01:12,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:01:12,604 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:01:12,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:01:12,752 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:01:12,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:01:13,540 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 7 [2021-12-17 01:01:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 355 proven. 1424 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-12-17 01:01:13,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:01:14,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:01:14,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:01:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 54 proven. 1430 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2021-12-17 01:01:14,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312027150] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:01:14,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:01:14,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 45] total 87 [2021-12-17 01:01:14,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035194684] [2021-12-17 01:01:14,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:01:14,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-17 01:01:14,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:01:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-17 01:01:14,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=7139, Unknown=0, NotChecked=0, Total=7482 [2021-12-17 01:01:14,800 INFO L87 Difference]: Start difference. First operand 319 states and 324 transitions. Second operand has 87 states, 87 states have (on average 3.1494252873563218) internal successors, (274), 83 states have internal predecessors, (274), 40 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 42 states have call predecessors, (45), 40 states have call successors, (45) [2021-12-17 01:01:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:01:16,709 INFO L93 Difference]: Finished difference Result 321 states and 325 transitions. [2021-12-17 01:01:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-17 01:01:16,709 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.1494252873563218) internal successors, (274), 83 states have internal predecessors, (274), 40 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 42 states have call predecessors, (45), 40 states have call successors, (45) Word has length 251 [2021-12-17 01:01:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:01:16,710 INFO L225 Difference]: With dead ends: 321 [2021-12-17 01:01:16,710 INFO L226 Difference]: Without dead ends: 319 [2021-12-17 01:01:16,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 499 SyntacticMatches, 28 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4551 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=529, Invalid=11461, Unknown=0, NotChecked=0, Total=11990 [2021-12-17 01:01:16,711 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 179 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 4691 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 4915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 4691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 01:01:16,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1960 Invalid, 4915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 4691 Invalid, 0 Unknown, 117 Unchecked, 1.5s Time] [2021-12-17 01:01:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-17 01:01:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 244. [2021-12-17 01:01:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 22 states have call successors, (22), 20 states have call predecessors, (22), 20 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 01:01:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2021-12-17 01:01:16,759 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 251 [2021-12-17 01:01:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:01:16,759 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2021-12-17 01:01:16,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.1494252873563218) internal successors, (274), 83 states have internal predecessors, (274), 40 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 42 states have call predecessors, (45), 40 states have call successors, (45) [2021-12-17 01:01:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2021-12-17 01:01:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-17 01:01:16,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:01:16,760 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:01:16,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-12-17 01:01:16,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:16,961 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:01:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:01:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1573116969, now seen corresponding path program 57 times [2021-12-17 01:01:16,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:01:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654015014] [2021-12-17 01:01:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:01:16,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:01:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:01:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:01:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:01:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:01:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:01:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:01:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:01:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:01:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:01:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:01:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:01:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:01:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:01:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:01:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:01:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:01:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:01:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:01:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:01:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:01:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:01:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:01:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 60 proven. 1488 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 01:01:17,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:01:17,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654015014] [2021-12-17 01:01:17,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654015014] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:17,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710221729] [2021-12-17 01:01:17,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:01:17,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:17,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:01:17,815 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:01:17,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-17 01:01:19,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-17 01:01:19,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:01:19,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-17 01:01:19,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:01:20,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:01:21,057 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:01:21,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:01:22,004 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 7 [2021-12-17 01:01:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 138 proven. 1488 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-17 01:01:22,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:01:22,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:01:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:01:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 60 proven. 1488 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 01:01:22,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710221729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:01:22,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:01:22,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 92 [2021-12-17 01:01:22,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784055783] [2021-12-17 01:01:22,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:01:22,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-17 01:01:22,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:01:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-17 01:01:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=8021, Unknown=0, NotChecked=0, Total=8372 [2021-12-17 01:01:22,971 INFO L87 Difference]: Start difference. First operand 244 states and 247 transitions. Second operand has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 88 states have internal predecessors, (291), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2021-12-17 01:01:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:01:25,080 INFO L93 Difference]: Finished difference Result 332 states and 336 transitions. [2021-12-17 01:01:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-17 01:01:25,080 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 88 states have internal predecessors, (291), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) Word has length 251 [2021-12-17 01:01:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:01:25,081 INFO L225 Difference]: With dead ends: 332 [2021-12-17 01:01:25,081 INFO L226 Difference]: Without dead ends: 330 [2021-12-17 01:01:25,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 506 SyntacticMatches, 14 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4280 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=553, Invalid=13019, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 01:01:25,082 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 172 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 4824 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 5078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 4824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 01:01:25,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2060 Invalid, 5078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 4824 Invalid, 0 Unknown, 167 Unchecked, 1.5s Time] [2021-12-17 01:01:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-17 01:01:25,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 257. [2021-12-17 01:01:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:01:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2021-12-17 01:01:25,139 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 251 [2021-12-17 01:01:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:01:25,139 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2021-12-17 01:01:25,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 88 states have internal predecessors, (291), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2021-12-17 01:01:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2021-12-17 01:01:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-17 01:01:25,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:01:25,140 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:01:25,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-17 01:01:25,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:25,341 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:01:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:01:25,341 INFO L85 PathProgramCache]: Analyzing trace with hash 640326989, now seen corresponding path program 58 times [2021-12-17 01:01:25,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:01:25,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016520305] [2021-12-17 01:01:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:01:25,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:01:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:01:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:01:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:01:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:01:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:01:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:01:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:01:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:01:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:01:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:01:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:01:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:01:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:01:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:01:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:01:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:01:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:01:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:01:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:01:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:01:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:01:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:01:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 63 proven. 1559 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 01:01:26,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:01:26,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016520305] [2021-12-17 01:01:26,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016520305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:26,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890722878] [2021-12-17 01:01:26,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:01:26,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:26,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:01:26,314 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:01:26,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-17 01:01:26,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:01:26,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:01:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-17 01:01:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:01:28,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 01:01:29,116 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 7 [2021-12-17 01:01:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 63 proven. 1559 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 01:01:29,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:01:29,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 01:01:29,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 01:01:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 63 proven. 1559 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 01:01:30,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890722878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:01:30,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:01:30,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 92 [2021-12-17 01:01:30,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742030294] [2021-12-17 01:01:30,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:01:30,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-17 01:01:30,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:01:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-17 01:01:30,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=8062, Unknown=0, NotChecked=0, Total=8372 [2021-12-17 01:01:30,033 INFO L87 Difference]: Start difference. First operand 257 states and 261 transitions. Second operand has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 88 states have internal predecessors, (296), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2021-12-17 01:01:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:01:34,623 INFO L93 Difference]: Finished difference Result 358 states and 363 transitions. [2021-12-17 01:01:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-17 01:01:34,623 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 88 states have internal predecessors, (296), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) Word has length 255 [2021-12-17 01:01:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:01:34,624 INFO L225 Difference]: With dead ends: 358 [2021-12-17 01:01:34,624 INFO L226 Difference]: Without dead ends: 356 [2021-12-17 01:01:34,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 500 SyntacticMatches, 11 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7046 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1021, Invalid=23785, Unknown=0, NotChecked=0, Total=24806 [2021-12-17 01:01:34,626 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 282 mSDsluCounter, 4574 mSDsCounter, 0 mSdLazyCounter, 9107 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 4651 SdHoareTripleChecker+Invalid, 9392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 9107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:01:34,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 4651 Invalid, 9392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 9107 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 01:01:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-17 01:01:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 261. [2021-12-17 01:01:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:01:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2021-12-17 01:01:34,677 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 255 [2021-12-17 01:01:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:01:34,677 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2021-12-17 01:01:34,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 88 states have internal predecessors, (296), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2021-12-17 01:01:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2021-12-17 01:01:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-17 01:01:34,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:01:34,679 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 21, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:01:34,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-17 01:01:34,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:34,883 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:01:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:01:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash 372376730, now seen corresponding path program 59 times [2021-12-17 01:01:34,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:01:34,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34266768] [2021-12-17 01:01:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:01:34,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:01:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:01:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:01:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:01:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:01:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:01:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:01:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:01:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:01:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:01:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:01:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:01:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:01:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:01:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:01:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:01:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:01:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:01:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:01:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:01:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:01:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:01:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:01:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:01:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 60 proven. 1575 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-12-17 01:01:35,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:01:35,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34266768] [2021-12-17 01:01:35,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34266768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:35,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66773312] [2021-12-17 01:01:35,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:01:35,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:35,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:01:35,984 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:01:35,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-17 01:01:36,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-17 01:01:36,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:01:36,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-17 01:01:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:01:37,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:01:39,420 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:01:39,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:01:41,650 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:01:41,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:01:42,563 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 7 [2021-12-17 01:01:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 219 proven. 1572 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2021-12-17 01:01:42,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:01:42,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66773312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:42,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:01:42,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2021-12-17 01:01:42,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344345145] [2021-12-17 01:01:42,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:01:42,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-17 01:01:42,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:01:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-17 01:01:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5130, Unknown=1, NotChecked=0, Total=5402 [2021-12-17 01:01:42,869 INFO L87 Difference]: Start difference. First operand 261 states and 265 transitions. Second operand has 72 states, 72 states have (on average 3.2083333333333335) internal successors, (231), 69 states have internal predecessors, (231), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 26 states have call predecessors, (26), 24 states have call successors, (26) [2021-12-17 01:01:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:01:45,752 INFO L93 Difference]: Finished difference Result 340 states and 344 transitions. [2021-12-17 01:01:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-17 01:01:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.2083333333333335) internal successors, (231), 69 states have internal predecessors, (231), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 26 states have call predecessors, (26), 24 states have call successors, (26) Word has length 259 [2021-12-17 01:01:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:01:45,753 INFO L225 Difference]: With dead ends: 340 [2021-12-17 01:01:45,754 INFO L226 Difference]: Without dead ends: 338 [2021-12-17 01:01:45,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 346 SyntacticMatches, 17 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=500, Invalid=9599, Unknown=1, NotChecked=0, Total=10100 [2021-12-17 01:01:45,754 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 111 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 6756 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 3465 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 6756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 01:01:45,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 3465 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 6756 Invalid, 0 Unknown, 289 Unchecked, 2.3s Time] [2021-12-17 01:01:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-17 01:01:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 261. [2021-12-17 01:01:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:01:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2021-12-17 01:01:45,810 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 259 [2021-12-17 01:01:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:01:45,810 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2021-12-17 01:01:45,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.2083333333333335) internal successors, (231), 69 states have internal predecessors, (231), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 26 states have call predecessors, (26), 24 states have call successors, (26) [2021-12-17 01:01:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2021-12-17 01:01:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-17 01:01:45,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:01:45,812 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:01:45,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-17 01:01:46,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:46,032 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:01:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:01:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1296864317, now seen corresponding path program 60 times [2021-12-17 01:01:46,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:01:46,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922197363] [2021-12-17 01:01:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:01:46,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:01:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:01:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:01:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:01:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:01:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:01:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:01:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:01:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:01:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:01:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:01:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:01:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:01:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:01:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:01:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:01:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:01:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:01:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:01:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:01:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:01:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:01:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:01:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 723 proven. 857 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-17 01:01:46,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:01:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922197363] [2021-12-17 01:01:46,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922197363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:46,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215636838] [2021-12-17 01:01:46,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:01:46,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:46,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:01:46,589 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:01:46,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-17 01:01:47,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-17 01:01:47,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:01:47,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 01:01:47,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:01:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 800 proven. 780 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-17 01:01:48,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:01:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 800 proven. 780 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-17 01:01:48,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215636838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:01:48,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:01:48,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2021-12-17 01:01:48,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547922678] [2021-12-17 01:01:48,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:01:48,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-17 01:01:48,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:01:48,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-17 01:01:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2021-12-17 01:01:48,766 INFO L87 Difference]: Start difference. First operand 261 states and 265 transitions. Second operand has 68 states, 68 states have (on average 3.573529411764706) internal successors, (243), 68 states have internal predecessors, (243), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2021-12-17 01:01:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:01:49,334 INFO L93 Difference]: Finished difference Result 361 states and 366 transitions. [2021-12-17 01:01:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 01:01:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.573529411764706) internal successors, (243), 68 states have internal predecessors, (243), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 259 [2021-12-17 01:01:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:01:49,335 INFO L225 Difference]: With dead ends: 361 [2021-12-17 01:01:49,335 INFO L226 Difference]: Without dead ends: 273 [2021-12-17 01:01:49,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2021-12-17 01:01:49,336 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 491 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 01:01:49,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 494 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 01:01:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-17 01:01:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 256. [2021-12-17 01:01:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 01:01:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 259 transitions. [2021-12-17 01:01:49,386 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 259 transitions. Word has length 259 [2021-12-17 01:01:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:01:49,386 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 259 transitions. [2021-12-17 01:01:49,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.573529411764706) internal successors, (243), 68 states have internal predecessors, (243), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2021-12-17 01:01:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 259 transitions. [2021-12-17 01:01:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-17 01:01:49,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:01:49,388 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:01:49,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-12-17 01:01:49,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-17 01:01:49,597 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:01:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:01:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash -152279920, now seen corresponding path program 61 times [2021-12-17 01:01:49,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:01:49,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696558741] [2021-12-17 01:01:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:01:49,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:01:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:01:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:01:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:01:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:01:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:01:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:01:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:01:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:01:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:01:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:01:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:01:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:01:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:01:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:01:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:01:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:01:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:01:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:01:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:01:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:01:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:01:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:01:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:01:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2595 backedges. 63 proven. 1646 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-12-17 01:01:50,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:01:50,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696558741] [2021-12-17 01:01:50,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696558741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:50,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719717637] [2021-12-17 01:01:50,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:01:50,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:50,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:01:50,500 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:01:50,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-17 01:01:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-17 01:01:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:01:52,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:01:52,620 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:01:52,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:01:53,637 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 7 [2021-12-17 01:01:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2595 backedges. 145 proven. 1646 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 01:01:53,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:01:53,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:01:53,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:01:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2595 backedges. 63 proven. 1646 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-12-17 01:01:54,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719717637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:01:54,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:01:54,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 96 [2021-12-17 01:01:54,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077693306] [2021-12-17 01:01:54,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:01:54,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-17 01:01:54,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:01:54,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-17 01:01:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=8753, Unknown=0, NotChecked=0, Total=9120 [2021-12-17 01:01:54,730 INFO L87 Difference]: Start difference. First operand 256 states and 259 transitions. Second operand has 96 states, 96 states have (on average 3.1770833333333335) internal successors, (305), 92 states have internal predecessors, (305), 43 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2021-12-17 01:01:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:01:57,499 INFO L93 Difference]: Finished difference Result 354 states and 358 transitions. [2021-12-17 01:01:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-17 01:01:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.1770833333333335) internal successors, (305), 92 states have internal predecessors, (305), 43 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) Word has length 263 [2021-12-17 01:01:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:01:57,500 INFO L225 Difference]: With dead ends: 354 [2021-12-17 01:01:57,500 INFO L226 Difference]: Without dead ends: 352 [2021-12-17 01:01:57,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 511 SyntacticMatches, 15 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4842 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=594, Invalid=14658, Unknown=0, NotChecked=0, Total=15252 [2021-12-17 01:01:57,502 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 184 mSDsluCounter, 2292 mSDsCounter, 0 mSdLazyCounter, 6503 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 6823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 6503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:01:57,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 2366 Invalid, 6823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 6503 Invalid, 0 Unknown, 146 Unchecked, 2.1s Time] [2021-12-17 01:01:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-17 01:01:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 269. [2021-12-17 01:01:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 24 states have call successors, (24), 22 states have call predecessors, (24), 22 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 01:01:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 273 transitions. [2021-12-17 01:01:57,556 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 273 transitions. Word has length 263 [2021-12-17 01:01:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:01:57,557 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 273 transitions. [2021-12-17 01:01:57,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.1770833333333335) internal successors, (305), 92 states have internal predecessors, (305), 43 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2021-12-17 01:01:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 273 transitions. [2021-12-17 01:01:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-17 01:01:57,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:01:57,558 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:01:57,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-12-17 01:01:57,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:57,758 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:01:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:01:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash 854186374, now seen corresponding path program 62 times [2021-12-17 01:01:57,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:01:57,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8049610] [2021-12-17 01:01:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:01:57,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:01:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:01:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:01:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:01:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:01:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:01:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:01:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:01:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:01:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:01:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:01:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:01:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:01:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:01:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:01:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:01:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:01:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:01:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:01:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:01:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:01:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:01:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:01:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:01:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:01:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 66 proven. 1721 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-12-17 01:01:58,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:01:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8049610] [2021-12-17 01:01:58,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8049610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:01:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913863700] [2021-12-17 01:01:58,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:01:58,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:01:58,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:01:58,822 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:01:58,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-17 01:01:59,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:01:59,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:01:59,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-17 01:01:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:02:00,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:02:02,566 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:02:02,567 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 25 treesize of output 12 [2021-12-17 01:02:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 846 proven. 941 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-12-17 01:02:02,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:02:04,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:02:04,830 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 42 treesize of output 36 [2021-12-17 01:02:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 826 proven. 961 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-12-17 01:02:06,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913863700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:02:06,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:02:06,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 52] total 146 [2021-12-17 01:02:06,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689877296] [2021-12-17 01:02:06,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:02:06,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-12-17 01:02:06,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:02:06,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-12-17 01:02:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2401, Invalid=18769, Unknown=0, NotChecked=0, Total=21170 [2021-12-17 01:02:06,904 INFO L87 Difference]: Start difference. First operand 269 states and 273 transitions. Second operand has 146 states, 146 states have (on average 3.1164383561643834) internal successors, (455), 141 states have internal predecessors, (455), 64 states have call successors, (65), 1 states have call predecessors, (65), 2 states have return successors, (66), 66 states have call predecessors, (66), 64 states have call successors, (66) [2021-12-17 01:02:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:02:12,282 INFO L93 Difference]: Finished difference Result 352 states and 356 transitions. [2021-12-17 01:02:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-17 01:02:12,282 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.1164383561643834) internal successors, (455), 141 states have internal predecessors, (455), 64 states have call successors, (65), 1 states have call predecessors, (65), 2 states have return successors, (66), 66 states have call predecessors, (66), 64 states have call successors, (66) Word has length 267 [2021-12-17 01:02:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:02:12,283 INFO L225 Difference]: With dead ends: 352 [2021-12-17 01:02:12,283 INFO L226 Difference]: Without dead ends: 264 [2021-12-17 01:02:12,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 519 SyntacticMatches, 6 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16027 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=5128, Invalid=48928, Unknown=0, NotChecked=0, Total=54056 [2021-12-17 01:02:12,286 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 146 mSDsluCounter, 2424 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:02:12,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 2496 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2480 Invalid, 0 Unknown, 288 Unchecked, 0.9s Time] [2021-12-17 01:02:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-17 01:02:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-12-17 01:02:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 24 states have call successors, (24), 22 states have call predecessors, (24), 22 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 01:02:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 267 transitions. [2021-12-17 01:02:12,340 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 267 transitions. Word has length 267 [2021-12-17 01:02:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:02:12,340 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 267 transitions. [2021-12-17 01:02:12,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.1164383561643834) internal successors, (455), 141 states have internal predecessors, (455), 64 states have call successors, (65), 1 states have call predecessors, (65), 2 states have return successors, (66), 66 states have call predecessors, (66), 64 states have call successors, (66) [2021-12-17 01:02:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 267 transitions. [2021-12-17 01:02:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-17 01:02:12,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:02:12,341 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 22, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:02:12,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-12-17 01:02:12,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-17 01:02:12,545 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:02:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:02:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1994406099, now seen corresponding path program 63 times [2021-12-17 01:02:12,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:02:12,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878925415] [2021-12-17 01:02:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:02:12,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:02:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:02:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:02:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:02:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:02:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:02:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:02:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:02:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:02:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:02:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:02:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:02:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:02:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:02:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:02:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:02:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:02:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:02:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:02:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:02:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:02:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:02:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:02:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:02:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:02:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2772 backedges. 63 proven. 1737 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2021-12-17 01:02:13,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:02:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878925415] [2021-12-17 01:02:13,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878925415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:02:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355357452] [2021-12-17 01:02:13,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:02:13,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:02:13,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:02:13,579 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:02:13,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-17 01:02:15,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-17 01:02:15,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:02:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-17 01:02:15,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:02:16,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:02:16,690 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:02:16,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:02:16,867 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:02:16,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:02:17,914 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 7 [2021-12-17 01:02:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2772 backedges. 230 proven. 1734 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2021-12-17 01:02:17,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:02:18,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:02:18,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:02:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2772 backedges. 63 proven. 1736 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2021-12-17 01:02:19,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355357452] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:02:19,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:02:19,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 97 [2021-12-17 01:02:19,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809701860] [2021-12-17 01:02:19,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:02:19,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-17 01:02:19,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:02:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-17 01:02:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=8938, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 01:02:19,034 INFO L87 Difference]: Start difference. First operand 264 states and 267 transitions. Second operand has 97 states, 97 states have (on average 3.195876288659794) internal successors, (310), 93 states have internal predecessors, (310), 44 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 46 states have call predecessors, (47), 44 states have call successors, (47) [2021-12-17 01:02:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:02:22,146 INFO L93 Difference]: Finished difference Result 278 states and 281 transitions. [2021-12-17 01:02:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 01:02:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.195876288659794) internal successors, (310), 93 states have internal predecessors, (310), 44 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 46 states have call predecessors, (47), 44 states have call successors, (47) Word has length 271 [2021-12-17 01:02:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:02:22,147 INFO L225 Difference]: With dead ends: 278 [2021-12-17 01:02:22,147 INFO L226 Difference]: Without dead ends: 276 [2021-12-17 01:02:22,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 527 SyntacticMatches, 18 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5263 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=612, Invalid=15138, Unknown=0, NotChecked=0, Total=15750 [2021-12-17 01:02:22,148 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 210 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 7581 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 2893 SdHoareTripleChecker+Invalid, 7913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 7581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 01:02:22,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 2893 Invalid, 7913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 7581 Invalid, 0 Unknown, 122 Unchecked, 2.5s Time] [2021-12-17 01:02:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-17 01:02:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 268. [2021-12-17 01:02:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 24 states have call successors, (24), 22 states have call predecessors, (24), 22 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 01:02:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 271 transitions. [2021-12-17 01:02:22,204 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 271 transitions. Word has length 271 [2021-12-17 01:02:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:02:22,204 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 271 transitions. [2021-12-17 01:02:22,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.195876288659794) internal successors, (310), 93 states have internal predecessors, (310), 44 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 46 states have call predecessors, (47), 44 states have call successors, (47) [2021-12-17 01:02:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 271 transitions. [2021-12-17 01:02:22,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-17 01:02:22,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:02:22,205 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:02:22,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-17 01:02:22,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-17 01:02:22,406 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:02:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:02:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash 813945929, now seen corresponding path program 64 times [2021-12-17 01:02:22,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:02:22,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191100380] [2021-12-17 01:02:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:02:22,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:02:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:02:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:02:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:02:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:02:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:02:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:02:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:02:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:02:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:02:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:02:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:02:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:02:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:02:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:02:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:02:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:02:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:02:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:02:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:02:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:02:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:02:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:02:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:02:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:02:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 66 proven. 1812 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2021-12-17 01:02:23,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:02:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191100380] [2021-12-17 01:02:23,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191100380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:02:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115624059] [2021-12-17 01:02:23,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:02:23,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:02:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:02:23,451 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:02:23,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-17 01:02:23,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:02:23,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:02:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-17 01:02:23,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:02:25,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:02:29,669 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:02:29,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:02:30,934 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 7 [2021-12-17 01:02:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 152 proven. 1812 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-12-17 01:02:30,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:02:31,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:02:31,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:02:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 66 proven. 1812 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2021-12-17 01:02:32,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115624059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:02:32,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:02:32,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 100 [2021-12-17 01:02:32,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952339711] [2021-12-17 01:02:32,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:02:32,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-17 01:02:32,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:02:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-17 01:02:32,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=9515, Unknown=2, NotChecked=0, Total=9900 [2021-12-17 01:02:32,034 INFO L87 Difference]: Start difference. First operand 268 states and 271 transitions. Second operand has 100 states, 100 states have (on average 3.19) internal successors, (319), 96 states have internal predecessors, (319), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) [2021-12-17 01:02:35,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:02:35,134 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2021-12-17 01:02:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-17 01:02:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.19) internal successors, (319), 96 states have internal predecessors, (319), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) Word has length 275 [2021-12-17 01:02:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:02:35,135 INFO L225 Difference]: With dead ends: 364 [2021-12-17 01:02:35,135 INFO L226 Difference]: Without dead ends: 362 [2021-12-17 01:02:35,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 553 SyntacticMatches, 16 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5058 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=601, Invalid=15399, Unknown=2, NotChecked=0, Total=16002 [2021-12-17 01:02:35,136 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 141 mSDsluCounter, 3916 mSDsCounter, 0 mSdLazyCounter, 7772 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 3994 SdHoareTripleChecker+Invalid, 8057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 7772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 01:02:35,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 3994 Invalid, 8057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 7772 Invalid, 0 Unknown, 231 Unchecked, 2.5s Time] [2021-12-17 01:02:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-17 01:02:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 281. [2021-12-17 01:02:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 232 states have (on average 1.0129310344827587) internal successors, (235), 232 states have internal predecessors, (235), 25 states have call successors, (25), 23 states have call predecessors, (25), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 01:02:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2021-12-17 01:02:35,195 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 275 [2021-12-17 01:02:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:02:35,196 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2021-12-17 01:02:35,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.19) internal successors, (319), 96 states have internal predecessors, (319), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) [2021-12-17 01:02:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2021-12-17 01:02:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-12-17 01:02:35,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:02:35,197 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:02:35,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-17 01:02:35,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-17 01:02:35,401 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:02:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:02:35,402 INFO L85 PathProgramCache]: Analyzing trace with hash -278870849, now seen corresponding path program 65 times [2021-12-17 01:02:35,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:02:35,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111213421] [2021-12-17 01:02:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:02:35,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:02:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:02:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:02:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:02:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:02:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:02:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:02:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:02:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:02:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:02:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:02:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:02:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:02:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:02:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:02:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:02:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:02:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:02:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:02:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:02:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:02:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:02:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:02:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:02:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:02:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2932 backedges. 69 proven. 1891 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2021-12-17 01:02:36,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:02:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111213421] [2021-12-17 01:02:36,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111213421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:02:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089386848] [2021-12-17 01:02:36,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:02:36,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:02:36,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:02:36,446 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:02:36,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-17 01:02:36,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-17 01:02:36,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:02:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-17 01:02:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:02:38,584 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 13 treesize of output 9 [2021-12-17 01:02:39,785 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 7 [2021-12-17 01:02:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2932 backedges. 69 proven. 1891 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2021-12-17 01:02:39,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:02:40,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 01:02:40,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 01:02:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2932 backedges. 69 proven. 1891 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2021-12-17 01:02:40,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089386848] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:02:40,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:02:40,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 100 [2021-12-17 01:02:40,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973213126] [2021-12-17 01:02:40,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:02:40,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-17 01:02:40,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:02:40,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-17 01:02:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=9562, Unknown=0, NotChecked=0, Total=9900 [2021-12-17 01:02:40,866 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 100 states, 100 states have (on average 3.24) internal successors, (324), 96 states have internal predecessors, (324), 45 states have call successors, (46), 1 states have call predecessors, (46), 2 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) [2021-12-17 01:02:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:02:46,005 INFO L93 Difference]: Finished difference Result 390 states and 395 transitions. [2021-12-17 01:02:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-17 01:02:46,006 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.24) internal successors, (324), 96 states have internal predecessors, (324), 45 states have call successors, (46), 1 states have call predecessors, (46), 2 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) Word has length 279 [2021-12-17 01:02:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:02:46,007 INFO L225 Difference]: With dead ends: 390 [2021-12-17 01:02:46,007 INFO L226 Difference]: Without dead ends: 388 [2021-12-17 01:02:46,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 548 SyntacticMatches, 11 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8380 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1115, Invalid=28297, Unknown=0, NotChecked=0, Total=29412 [2021-12-17 01:02:46,008 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 434 mSDsluCounter, 4462 mSDsCounter, 0 mSdLazyCounter, 10078 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 4545 SdHoareTripleChecker+Invalid, 10497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 10078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:02:46,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 4545 Invalid, 10497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 10078 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 01:02:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-17 01:02:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 285. [2021-12-17 01:02:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 25 states have call successors, (25), 23 states have call predecessors, (25), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 01:02:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 289 transitions. [2021-12-17 01:02:46,072 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 289 transitions. Word has length 279 [2021-12-17 01:02:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:02:46,072 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 289 transitions. [2021-12-17 01:02:46,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.24) internal successors, (324), 96 states have internal predecessors, (324), 45 states have call successors, (46), 1 states have call predecessors, (46), 2 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) [2021-12-17 01:02:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 289 transitions. [2021-12-17 01:02:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-17 01:02:46,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:02:46,073 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 23, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:02:46,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-12-17 01:02:46,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-17 01:02:46,274 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:02:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:02:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1235508236, now seen corresponding path program 66 times [2021-12-17 01:02:46,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:02:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47009901] [2021-12-17 01:02:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:02:46,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:02:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:02:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:02:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:02:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:02:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:02:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:02:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:02:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:02:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:02:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:02:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:02:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:02:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:02:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:02:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:02:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:02:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:02:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:02:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:02:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:02:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:02:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:02:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:02:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:02:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:02:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 66 proven. 1907 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-12-17 01:02:47,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:02:47,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47009901] [2021-12-17 01:02:47,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47009901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:02:47,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580761602] [2021-12-17 01:02:47,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:02:47,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:02:47,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:02:47,521 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:02:47,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-17 01:02:50,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-17 01:02:50,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:02:50,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-17 01:02:50,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:02:51,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:02:51,804 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:02:51,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:02:51,970 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:02:51,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:02:53,164 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 7 [2021-12-17 01:02:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 241 proven. 1904 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2021-12-17 01:02:53,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:02:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:02:53,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:02:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 66 proven. 1906 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2021-12-17 01:02:54,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580761602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:02:54,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:02:54,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 101 [2021-12-17 01:02:54,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169074193] [2021-12-17 01:02:54,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:02:54,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-17 01:02:54,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:02:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-17 01:02:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=9710, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 01:02:54,347 INFO L87 Difference]: Start difference. First operand 285 states and 289 transitions. Second operand has 101 states, 101 states have (on average 3.207920792079208) internal successors, (324), 97 states have internal predecessors, (324), 46 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 48 states have call predecessors, (49), 46 states have call successors, (49) [2021-12-17 01:02:57,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:02:57,196 INFO L93 Difference]: Finished difference Result 372 states and 376 transitions. [2021-12-17 01:02:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-17 01:02:57,197 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.207920792079208) internal successors, (324), 97 states have internal predecessors, (324), 46 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 48 states have call predecessors, (49), 46 states have call successors, (49) Word has length 283 [2021-12-17 01:02:57,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:02:57,198 INFO L225 Difference]: With dead ends: 372 [2021-12-17 01:02:57,198 INFO L226 Difference]: Without dead ends: 370 [2021-12-17 01:02:57,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 571 SyntacticMatches, 18 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5310 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=598, Invalid=15404, Unknown=0, NotChecked=0, Total=16002 [2021-12-17 01:02:57,199 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 253 mSDsluCounter, 3855 mSDsCounter, 0 mSdLazyCounter, 7111 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 3934 SdHoareTripleChecker+Invalid, 7372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 7111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:02:57,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 3934 Invalid, 7372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 7111 Invalid, 0 Unknown, 136 Unchecked, 2.2s Time] [2021-12-17 01:02:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-12-17 01:02:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 285. [2021-12-17 01:02:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 25 states have call successors, (25), 23 states have call predecessors, (25), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 01:02:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 289 transitions. [2021-12-17 01:02:57,271 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 289 transitions. Word has length 283 [2021-12-17 01:02:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:02:57,271 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 289 transitions. [2021-12-17 01:02:57,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.207920792079208) internal successors, (324), 97 states have internal predecessors, (324), 46 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 48 states have call predecessors, (49), 46 states have call successors, (49) [2021-12-17 01:02:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 289 transitions. [2021-12-17 01:02:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-17 01:02:57,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:02:57,272 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:02:57,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-17 01:02:57,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:02:57,473 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:02:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:02:57,473 INFO L85 PathProgramCache]: Analyzing trace with hash 482642485, now seen corresponding path program 67 times [2021-12-17 01:02:57,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:02:57,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124726887] [2021-12-17 01:02:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:02:57,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:02:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:02:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:02:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:02:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:02:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:02:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:02:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:02:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:02:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:02:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:02:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:02:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:02:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:02:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:02:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:02:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:02:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:02:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:02:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:02:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:02:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:02:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:02:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:02:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:02:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3018 backedges. 883 proven. 1031 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 01:02:58,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:02:58,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124726887] [2021-12-17 01:02:58,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124726887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:02:58,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581663349] [2021-12-17 01:02:58,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:02:58,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:02:58,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:02:58,103 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:02:58,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-17 01:02:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:02:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 01:02:58,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:02:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3018 backedges. 968 proven. 946 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 01:02:59,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:02:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3018 backedges. 968 proven. 946 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 01:02:59,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581663349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:02:59,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:02:59,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2021-12-17 01:02:59,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820996951] [2021-12-17 01:02:59,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:02:59,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-17 01:02:59,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:02:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-17 01:02:59,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 01:02:59,962 INFO L87 Difference]: Start difference. First operand 285 states and 289 transitions. Second operand has 74 states, 74 states have (on average 3.581081081081081) internal successors, (265), 74 states have internal predecessors, (265), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2021-12-17 01:03:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:03:00,608 INFO L93 Difference]: Finished difference Result 393 states and 398 transitions. [2021-12-17 01:03:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-17 01:03:00,609 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.581081081081081) internal successors, (265), 74 states have internal predecessors, (265), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 283 [2021-12-17 01:03:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:03:00,610 INFO L225 Difference]: With dead ends: 393 [2021-12-17 01:03:00,610 INFO L226 Difference]: Without dead ends: 297 [2021-12-17 01:03:00,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 01:03:00,610 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 523 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 01:03:00,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 562 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 01:03:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-17 01:03:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 280. [2021-12-17 01:03:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 231 states have (on average 1.0086580086580086) internal successors, (233), 231 states have internal predecessors, (233), 25 states have call successors, (25), 23 states have call predecessors, (25), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 01:03:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2021-12-17 01:03:00,675 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 283 [2021-12-17 01:03:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:03:00,675 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2021-12-17 01:03:00,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.581081081081081) internal successors, (265), 74 states have internal predecessors, (265), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2021-12-17 01:03:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2021-12-17 01:03:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-12-17 01:03:00,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:03:00,676 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:03:00,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-12-17 01:03:00,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:00,879 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:03:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:03:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -241061118, now seen corresponding path program 68 times [2021-12-17 01:03:00,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:03:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448884749] [2021-12-17 01:03:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:03:00,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:03:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:03:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:03:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:03:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:03:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:03:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:03:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:03:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:03:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:03:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:03:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:03:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:03:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:03:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:03:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:03:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:03:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:03:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:03:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:03:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:03:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:03:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:03:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:03:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:03:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:03:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 69 proven. 1986 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-12-17 01:03:01,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:03:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448884749] [2021-12-17 01:03:01,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448884749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:03:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210457695] [2021-12-17 01:03:01,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:03:01,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:01,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:03:01,975 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:03:01,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-17 01:03:02,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:03:02,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:03:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-17 01:03:02,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:03:03,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:03:06,202 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:03:06,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:03:07,414 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 7 [2021-12-17 01:03:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 159 proven. 1986 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2021-12-17 01:03:07,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:03:07,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:03:07,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:03:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 69 proven. 1986 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-12-17 01:03:08,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210457695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:03:08,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:03:08,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 104 [2021-12-17 01:03:08,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785941357] [2021-12-17 01:03:08,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:03:08,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-17 01:03:08,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:03:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-17 01:03:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=10312, Unknown=1, NotChecked=0, Total=10712 [2021-12-17 01:03:08,495 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand has 104 states, 104 states have (on average 3.201923076923077) internal successors, (333), 100 states have internal predecessors, (333), 47 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) [2021-12-17 01:03:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:03:12,291 INFO L93 Difference]: Finished difference Result 385 states and 389 transitions. [2021-12-17 01:03:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 01:03:12,291 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.201923076923077) internal successors, (333), 100 states have internal predecessors, (333), 47 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) Word has length 287 [2021-12-17 01:03:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:03:12,294 INFO L225 Difference]: With dead ends: 385 [2021-12-17 01:03:12,294 INFO L226 Difference]: Without dead ends: 383 [2021-12-17 01:03:12,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 561 SyntacticMatches, 13 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5706 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=654, Invalid=17435, Unknown=1, NotChecked=0, Total=18090 [2021-12-17 01:03:12,295 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 115 mSDsluCounter, 4963 mSDsCounter, 0 mSdLazyCounter, 9490 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 5045 SdHoareTripleChecker+Invalid, 9771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 9490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:03:12,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 5045 Invalid, 9771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 9490 Invalid, 0 Unknown, 177 Unchecked, 3.0s Time] [2021-12-17 01:03:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-17 01:03:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 293. [2021-12-17 01:03:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 26 states have call successors, (26), 24 states have call predecessors, (26), 24 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 01:03:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 297 transitions. [2021-12-17 01:03:12,370 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 297 transitions. Word has length 287 [2021-12-17 01:03:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:03:12,370 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 297 transitions. [2021-12-17 01:03:12,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.201923076923077) internal successors, (333), 100 states have internal predecessors, (333), 47 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) [2021-12-17 01:03:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 297 transitions. [2021-12-17 01:03:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-12-17 01:03:12,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:03:12,371 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:03:12,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-12-17 01:03:12,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:12,579 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:03:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:03:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash 479108856, now seen corresponding path program 69 times [2021-12-17 01:03:12,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:03:12,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419572986] [2021-12-17 01:03:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:03:12,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:03:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:03:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:03:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:03:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:03:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:03:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:03:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:03:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:03:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:03:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:03:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:03:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:03:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:03:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:03:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:03:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:03:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:03:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:03:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:03:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:03:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:03:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:03:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:03:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:03:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:03:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3203 backedges. 72 proven. 2069 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-12-17 01:03:13,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:03:13,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419572986] [2021-12-17 01:03:13,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419572986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:03:13,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791246197] [2021-12-17 01:03:13,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:03:13,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:13,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:03:13,710 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:03:13,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-17 01:03:17,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-12-17 01:03:17,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:03:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-17 01:03:17,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:03:19,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:03:21,832 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:03:21,833 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 25 treesize of output 12 [2021-12-17 01:03:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3203 backedges. 1018 proven. 1123 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-12-17 01:03:21,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:03:24,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:03:24,510 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 42 treesize of output 36 [2021-12-17 01:03:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3203 backedges. 996 proven. 1145 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-12-17 01:03:26,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791246197] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:03:26,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:03:26,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 158 [2021-12-17 01:03:26,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673461074] [2021-12-17 01:03:26,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:03:26,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-12-17 01:03:26,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:03:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-12-17 01:03:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=22303, Unknown=0, NotChecked=0, Total=24806 [2021-12-17 01:03:26,859 INFO L87 Difference]: Start difference. First operand 293 states and 297 transitions. Second operand has 158 states, 158 states have (on average 3.1455696202531644) internal successors, (497), 153 states have internal predecessors, (497), 70 states have call successors, (71), 1 states have call predecessors, (71), 2 states have return successors, (72), 72 states have call predecessors, (72), 70 states have call successors, (72) [2021-12-17 01:03:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:03:34,576 INFO L93 Difference]: Finished difference Result 384 states and 388 transitions. [2021-12-17 01:03:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-17 01:03:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.1455696202531644) internal successors, (497), 153 states have internal predecessors, (497), 70 states have call successors, (71), 1 states have call predecessors, (71), 2 states have return successors, (72), 72 states have call predecessors, (72), 70 states have call successors, (72) Word has length 291 [2021-12-17 01:03:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:03:34,578 INFO L225 Difference]: With dead ends: 384 [2021-12-17 01:03:34,578 INFO L226 Difference]: Without dead ends: 288 [2021-12-17 01:03:34,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 569 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21669 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=6465, Invalid=69435, Unknown=0, NotChecked=0, Total=75900 [2021-12-17 01:03:34,581 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 132 mSDsluCounter, 3363 mSDsCounter, 0 mSdLazyCounter, 3173 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 3441 SdHoareTripleChecker+Invalid, 3825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 516 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:03:34,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 3441 Invalid, 3825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3173 Invalid, 0 Unknown, 516 Unchecked, 1.2s Time] [2021-12-17 01:03:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-17 01:03:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-12-17 01:03:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 237 states have (on average 1.0084388185654007) internal successors, (239), 237 states have internal predecessors, (239), 26 states have call successors, (26), 24 states have call predecessors, (26), 24 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 01:03:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 291 transitions. [2021-12-17 01:03:34,658 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 291 transitions. Word has length 291 [2021-12-17 01:03:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:03:34,658 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 291 transitions. [2021-12-17 01:03:34,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.1455696202531644) internal successors, (497), 153 states have internal predecessors, (497), 70 states have call successors, (71), 1 states have call predecessors, (71), 2 states have return successors, (72), 72 states have call predecessors, (72), 70 states have call successors, (72) [2021-12-17 01:03:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 291 transitions. [2021-12-17 01:03:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-17 01:03:34,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:03:34,659 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 24, 24, 24, 24, 24, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:03:34,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-12-17 01:03:34,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-12-17 01:03:34,869 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:03:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:03:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash 553496133, now seen corresponding path program 70 times [2021-12-17 01:03:34,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:03:34,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9372090] [2021-12-17 01:03:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:03:34,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:03:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:03:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:03:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:03:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:03:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:03:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:03:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:03:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:03:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:03:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:03:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:03:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:03:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:03:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:03:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:03:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:03:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:03:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:03:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:03:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:03:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:03:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:36,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:03:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:36,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:03:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:36,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:03:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:36,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:03:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:03:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3310 backedges. 69 proven. 2085 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-12-17 01:03:36,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:03:36,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9372090] [2021-12-17 01:03:36,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9372090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:03:36,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318900130] [2021-12-17 01:03:36,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:03:36,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:36,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:03:36,043 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:03:36,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-17 01:03:36,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:03:36,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:03:36,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-17 01:03:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:03:38,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:03:38,502 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:03:38,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:03:38,672 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:03:38,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:03:39,884 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 7 [2021-12-17 01:03:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3310 backedges. 252 proven. 2082 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-12-17 01:03:39,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:03:40,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:03:40,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:03:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3310 backedges. 69 proven. 2084 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2021-12-17 01:03:41,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318900130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:03:41,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:03:41,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 105 [2021-12-17 01:03:41,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077845869] [2021-12-17 01:03:41,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:03:41,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-17 01:03:41,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:03:41,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-17 01:03:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=10514, Unknown=0, NotChecked=0, Total=10920 [2021-12-17 01:03:41,121 INFO L87 Difference]: Start difference. First operand 288 states and 291 transitions. Second operand has 105 states, 105 states have (on average 3.219047619047619) internal successors, (338), 101 states have internal predecessors, (338), 48 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (51), 50 states have call predecessors, (51), 48 states have call successors, (51) [2021-12-17 01:03:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:03:43,940 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2021-12-17 01:03:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-17 01:03:43,940 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.219047619047619) internal successors, (338), 101 states have internal predecessors, (338), 48 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (51), 50 states have call predecessors, (51), 48 states have call successors, (51) Word has length 295 [2021-12-17 01:03:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:03:43,941 INFO L225 Difference]: With dead ends: 297 [2021-12-17 01:03:43,941 INFO L226 Difference]: Without dead ends: 295 [2021-12-17 01:03:43,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 597 SyntacticMatches, 17 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=622, Invalid=16670, Unknown=0, NotChecked=0, Total=17292 [2021-12-17 01:03:43,942 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 173 mSDsluCounter, 3398 mSDsCounter, 0 mSdLazyCounter, 7042 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 3480 SdHoareTripleChecker+Invalid, 7273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 7042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:03:43,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 3480 Invalid, 7273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 7042 Invalid, 0 Unknown, 142 Unchecked, 2.2s Time] [2021-12-17 01:03:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-17 01:03:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2021-12-17 01:03:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 241 states have (on average 1.008298755186722) internal successors, (243), 241 states have internal predecessors, (243), 26 states have call successors, (26), 24 states have call predecessors, (26), 24 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 01:03:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 295 transitions. [2021-12-17 01:03:44,008 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 295 transitions. Word has length 295 [2021-12-17 01:03:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:03:44,008 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 295 transitions. [2021-12-17 01:03:44,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.219047619047619) internal successors, (338), 101 states have internal predecessors, (338), 48 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (51), 50 states have call predecessors, (51), 48 states have call successors, (51) [2021-12-17 01:03:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 295 transitions. [2021-12-17 01:03:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-17 01:03:44,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:03:44,009 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 24, 24, 24, 24, 24, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:03:44,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-17 01:03:44,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:44,210 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:03:44,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:03:44,210 INFO L85 PathProgramCache]: Analyzing trace with hash -81444677, now seen corresponding path program 71 times [2021-12-17 01:03:44,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:03:44,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093546076] [2021-12-17 01:03:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:03:44,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:03:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:03:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:03:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:03:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:03:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:03:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:03:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:03:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:03:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:03:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:03:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:03:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:03:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:03:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:03:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:03:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:03:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:03:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:03:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:03:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:03:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:03:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:03:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:03:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:03:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:03:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:03:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3396 backedges. 72 proven. 2168 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-12-17 01:03:45,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:03:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093546076] [2021-12-17 01:03:45,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093546076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:03:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738621958] [2021-12-17 01:03:45,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:03:45,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:45,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:03:45,386 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:03:45,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-17 01:03:45,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-17 01:03:45,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:03:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-17 01:03:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:03:47,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:03:49,949 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:03:49,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:03:51,286 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 7 [2021-12-17 01:03:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3396 backedges. 166 proven. 2168 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-12-17 01:03:51,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:03:51,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:03:51,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:03:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3396 backedges. 72 proven. 2168 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-12-17 01:03:52,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738621958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:03:52,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:03:52,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 108 [2021-12-17 01:03:52,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736130790] [2021-12-17 01:03:52,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:03:52,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-17 01:03:52,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:03:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-17 01:03:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=11140, Unknown=1, NotChecked=0, Total=11556 [2021-12-17 01:03:52,427 INFO L87 Difference]: Start difference. First operand 292 states and 295 transitions. Second operand has 108 states, 108 states have (on average 3.212962962962963) internal successors, (347), 104 states have internal predecessors, (347), 49 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2021-12-17 01:03:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:03:55,877 INFO L93 Difference]: Finished difference Result 396 states and 400 transitions. [2021-12-17 01:03:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 01:03:55,877 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.212962962962963) internal successors, (347), 104 states have internal predecessors, (347), 49 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) Word has length 299 [2021-12-17 01:03:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:03:55,878 INFO L225 Difference]: With dead ends: 396 [2021-12-17 01:03:55,878 INFO L226 Difference]: Without dead ends: 394 [2021-12-17 01:03:55,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 585 SyntacticMatches, 14 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5745 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=639, Invalid=17720, Unknown=1, NotChecked=0, Total=18360 [2021-12-17 01:03:55,879 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 154 mSDsluCounter, 3555 mSDsCounter, 0 mSdLazyCounter, 8686 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 9116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 8686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 01:03:55,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 3640 Invalid, 9116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 8686 Invalid, 0 Unknown, 288 Unchecked, 2.7s Time] [2021-12-17 01:03:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-17 01:03:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 305. [2021-12-17 01:03:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 27 states have call successors, (27), 25 states have call predecessors, (27), 25 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 01:03:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 309 transitions. [2021-12-17 01:03:55,960 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 309 transitions. Word has length 299 [2021-12-17 01:03:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:03:55,960 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 309 transitions. [2021-12-17 01:03:55,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.212962962962963) internal successors, (347), 104 states have internal predecessors, (347), 49 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2021-12-17 01:03:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 309 transitions. [2021-12-17 01:03:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-17 01:03:55,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:03:55,961 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 24, 24, 24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:03:55,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-12-17 01:03:56,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:56,162 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:03:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:03:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2041751601, now seen corresponding path program 72 times [2021-12-17 01:03:56,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:03:56,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905831262] [2021-12-17 01:03:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:03:56,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:03:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:03:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:03:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:03:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:03:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:03:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:03:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:03:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:03:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:03:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:03:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:03:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:03:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:03:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:03:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:03:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:03:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:03:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:03:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:03:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:03:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:03:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:03:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:03:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:03:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:03:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:03:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:03:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 75 proven. 2255 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-12-17 01:03:57,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:03:57,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905831262] [2021-12-17 01:03:57,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905831262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:03:57,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625816771] [2021-12-17 01:03:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:03:57,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:03:57,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:03:57,321 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:03:57,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-17 01:03:59,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-12-17 01:03:59,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:03:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-17 01:03:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:04:00,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:04:03,450 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-17 01:04:03,450 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 21 treesize of output 10 [2021-12-17 01:04:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 75 proven. 2255 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-12-17 01:04:03,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:04:05,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 01:04:05,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-17 01:04:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 75 proven. 2255 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-12-17 01:04:08,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625816771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:04:08,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:04:08,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58, 58] total 163 [2021-12-17 01:04:08,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328024877] [2021-12-17 01:04:08,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:04:08,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-12-17 01:04:08,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:04:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-12-17 01:04:08,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2360, Invalid=24046, Unknown=0, NotChecked=0, Total=26406 [2021-12-17 01:04:08,132 INFO L87 Difference]: Start difference. First operand 305 states and 309 transitions. Second operand has 163 states, 163 states have (on average 3.1779141104294477) internal successors, (518), 158 states have internal predecessors, (518), 73 states have call successors, (74), 1 states have call predecessors, (74), 2 states have return successors, (75), 75 states have call predecessors, (75), 73 states have call successors, (75) [2021-12-17 01:04:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:04:18,183 INFO L93 Difference]: Finished difference Result 491 states and 518 transitions. [2021-12-17 01:04:18,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-17 01:04:18,183 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 3.1779141104294477) internal successors, (518), 158 states have internal predecessors, (518), 73 states have call successors, (74), 1 states have call predecessors, (74), 2 states have return successors, (75), 75 states have call predecessors, (75), 73 states have call successors, (75) Word has length 303 [2021-12-17 01:04:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:04:18,184 INFO L225 Difference]: With dead ends: 491 [2021-12-17 01:04:18,184 INFO L226 Difference]: Without dead ends: 489 [2021-12-17 01:04:18,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 548 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18937 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=4594, Invalid=48998, Unknown=0, NotChecked=0, Total=53592 [2021-12-17 01:04:18,187 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 420 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 6057 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 3704 SdHoareTripleChecker+Invalid, 6458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 6057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:04:18,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 3704 Invalid, 6458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 6057 Invalid, 0 Unknown, 259 Unchecked, 2.1s Time] [2021-12-17 01:04:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-17 01:04:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-12-17 01:04:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 348 states have (on average 1.0086206896551724) internal successors, (351), 348 states have internal predecessors, (351), 27 states have call successors, (27), 25 states have call predecessors, (27), 25 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 01:04:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 405 transitions. [2021-12-17 01:04:18,330 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 405 transitions. Word has length 303 [2021-12-17 01:04:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:04:18,330 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 405 transitions. [2021-12-17 01:04:18,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 3.1779141104294477) internal successors, (518), 158 states have internal predecessors, (518), 73 states have call successors, (74), 1 states have call predecessors, (74), 2 states have return successors, (75), 75 states have call predecessors, (75), 73 states have call successors, (75) [2021-12-17 01:04:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 405 transitions. [2021-12-17 01:04:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-17 01:04:18,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:04:18,332 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 25, 25, 25, 25, 25, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:04:18,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-17 01:04:18,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-17 01:04:18,532 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:04:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:04:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash -575967362, now seen corresponding path program 73 times [2021-12-17 01:04:18,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:04:18,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61969640] [2021-12-17 01:04:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:04:18,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:04:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:04:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:04:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:04:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:04:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:04:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:04:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:04:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:04:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:04:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:04:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:04:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:04:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:04:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:04:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:04:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:04:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:04:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:04:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:04:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:04:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:04:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:04:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:04:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:04:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:04:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:04:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:04:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3597 backedges. 72 proven. 2271 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2021-12-17 01:04:19,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:04:19,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61969640] [2021-12-17 01:04:19,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61969640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:04:19,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662554841] [2021-12-17 01:04:19,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:04:19,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:04:19,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:04:19,846 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:04:19,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-17 01:04:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-17 01:04:20,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:04:21,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:04:23,539 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:04:23,539 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 [2021-12-17 01:04:23,803 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:04:23,804 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 [2021-12-17 01:04:24,944 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 9 [2021-12-17 01:04:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3597 backedges. 263 proven. 2268 refuted. 0 times theorem prover too weak. 1066 trivial. 0 not checked. [2021-12-17 01:04:24,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:04:25,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662554841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:04:25,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:04:25,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2021-12-17 01:04:25,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340824306] [2021-12-17 01:04:25,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:04:25,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-17 01:04:25,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:04:25,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-17 01:04:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=6994, Unknown=1, NotChecked=0, Total=7310 [2021-12-17 01:04:25,298 INFO L87 Difference]: Start difference. First operand 401 states and 405 transitions. Second operand has 84 states, 84 states have (on average 3.2738095238095237) internal successors, (275), 81 states have internal predecessors, (275), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2021-12-17 01:04:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:04:28,546 INFO L93 Difference]: Finished difference Result 496 states and 500 transitions. [2021-12-17 01:04:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-17 01:04:28,547 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.2738095238095237) internal successors, (275), 81 states have internal predecessors, (275), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 307 [2021-12-17 01:04:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:04:28,549 INFO L225 Difference]: With dead ends: 496 [2021-12-17 01:04:28,549 INFO L226 Difference]: Without dead ends: 494 [2021-12-17 01:04:28,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 431 SyntacticMatches, 22 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4339 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=539, Invalid=12570, Unknown=1, NotChecked=0, Total=13110 [2021-12-17 01:04:28,550 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 175 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 6799 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 3316 SdHoareTripleChecker+Invalid, 7088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:04:28,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 3316 Invalid, 7088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6799 Invalid, 0 Unknown, 192 Unchecked, 2.4s Time] [2021-12-17 01:04:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-12-17 01:04:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 401. [2021-12-17 01:04:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 348 states have (on average 1.0086206896551724) internal successors, (351), 348 states have internal predecessors, (351), 27 states have call successors, (27), 25 states have call predecessors, (27), 25 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 01:04:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 405 transitions. [2021-12-17 01:04:28,692 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 405 transitions. Word has length 307 [2021-12-17 01:04:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:04:28,693 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 405 transitions. [2021-12-17 01:04:28,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.2738095238095237) internal successors, (275), 81 states have internal predecessors, (275), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2021-12-17 01:04:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 405 transitions. [2021-12-17 01:04:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-17 01:04:28,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:04:28,694 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 25, 25, 25, 25, 25, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:04:28,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-12-17 01:04:28,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-17 01:04:28,895 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:04:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:04:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1009630580, now seen corresponding path program 74 times [2021-12-17 01:04:28,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:04:28,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846410654] [2021-12-17 01:04:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:04:28,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:04:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:04:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:04:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:04:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:04:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:04:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:04:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:04:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:04:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:04:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:04:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:04:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:04:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:04:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:04:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:04:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:04:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:04:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:04:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:04:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:04:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:04:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:04:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:04:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:04:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:04:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:04:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:04:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3687 backedges. 75 proven. 2358 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2021-12-17 01:04:30,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:04:30,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846410654] [2021-12-17 01:04:30,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846410654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:04:30,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347469703] [2021-12-17 01:04:30,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:04:30,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:04:30,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:04:30,231 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:04:30,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-17 01:04:30,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:04:30,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:04:30,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-17 01:04:30,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:04:31,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:04:33,799 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:04:33,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-17 01:04:35,031 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 9 [2021-12-17 01:04:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3687 backedges. 173 proven. 2358 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-12-17 01:04:35,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:04:35,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347469703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:04:35,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:04:35,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 85 [2021-12-17 01:04:35,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720592413] [2021-12-17 01:04:35,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:04:35,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-17 01:04:35,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:04:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-17 01:04:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=7169, Unknown=1, NotChecked=0, Total=7482 [2021-12-17 01:04:35,388 INFO L87 Difference]: Start difference. First operand 401 states and 405 transitions. Second operand has 85 states, 85 states have (on average 3.2941176470588234) internal successors, (280), 82 states have internal predecessors, (280), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-17 01:04:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:04:39,083 INFO L93 Difference]: Finished difference Result 510 states and 515 transitions. [2021-12-17 01:04:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-17 01:04:39,083 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.2941176470588234) internal successors, (280), 82 states have internal predecessors, (280), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) Word has length 311 [2021-12-17 01:04:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:04:39,085 INFO L225 Difference]: With dead ends: 510 [2021-12-17 01:04:39,085 INFO L226 Difference]: Without dead ends: 508 [2021-12-17 01:04:39,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 443 SyntacticMatches, 17 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=542, Invalid=13029, Unknown=1, NotChecked=0, Total=13572 [2021-12-17 01:04:39,085 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 160 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 8108 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 8367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 8108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:04:39,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 3249 Invalid, 8367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 8108 Invalid, 0 Unknown, 197 Unchecked, 2.9s Time] [2021-12-17 01:04:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-12-17 01:04:39,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 410. [2021-12-17 01:04:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 355 states have (on average 1.0112676056338028) internal successors, (359), 355 states have internal predecessors, (359), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-17 01:04:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 415 transitions. [2021-12-17 01:04:39,228 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 415 transitions. Word has length 311 [2021-12-17 01:04:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:04:39,228 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 415 transitions. [2021-12-17 01:04:39,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.2941176470588234) internal successors, (280), 82 states have internal predecessors, (280), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-17 01:04:39,229 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 415 transitions. [2021-12-17 01:04:39,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-17 01:04:39,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:04:39,230 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 25, 25, 25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:04:39,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-17 01:04:39,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:04:39,433 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:04:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:04:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash -733208470, now seen corresponding path program 75 times [2021-12-17 01:04:39,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:04:39,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075033091] [2021-12-17 01:04:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:04:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:04:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:04:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:04:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:04:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:04:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:04:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:04:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:04:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:04:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:04:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:04:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:04:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:04:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:04:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:04:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:04:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:04:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:04:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:04:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:04:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:04:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:04:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:04:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:04:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:04:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:04:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:04:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:04:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:04:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 78 proven. 2449 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2021-12-17 01:04:40,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:04:40,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075033091] [2021-12-17 01:04:40,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075033091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:04:40,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924578402] [2021-12-17 01:04:40,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:04:40,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:04:40,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:04:40,800 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:04:40,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-17 01:04:45,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-17 01:04:45,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:04:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-17 01:04:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:04:47,824 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 15 treesize of output 11 [2021-12-17 01:04:50,367 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:04:50,368 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 25 treesize of output 12 [2021-12-17 01:04:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 1206 proven. 1321 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2021-12-17 01:04:50,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:04:53,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:04:53,201 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 42 treesize of output 36 [2021-12-17 01:04:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 1182 proven. 1345 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2021-12-17 01:04:56,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924578402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:04:56,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:04:56,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60, 60] total 170 [2021-12-17 01:04:56,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767309192] [2021-12-17 01:04:56,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:04:56,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2021-12-17 01:04:56,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:04:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2021-12-17 01:04:56,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2890, Invalid=25840, Unknown=0, NotChecked=0, Total=28730 [2021-12-17 01:04:56,064 INFO L87 Difference]: Start difference. First operand 410 states and 415 transitions. Second operand has 170 states, 170 states have (on average 3.1705882352941175) internal successors, (539), 165 states have internal predecessors, (539), 76 states have call successors, (77), 1 states have call predecessors, (77), 2 states have return successors, (78), 78 states have call predecessors, (78), 76 states have call successors, (78) [2021-12-17 01:05:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:05:05,243 INFO L93 Difference]: Finished difference Result 603 states and 608 transitions. [2021-12-17 01:05:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-12-17 01:05:05,243 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 3.1705882352941175) internal successors, (539), 165 states have internal predecessors, (539), 76 states have call successors, (77), 1 states have call predecessors, (77), 2 states have return successors, (78), 78 states have call predecessors, (78), 76 states have call successors, (78) Word has length 315 [2021-12-17 01:05:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:05:05,244 INFO L225 Difference]: With dead ends: 603 [2021-12-17 01:05:05,244 INFO L226 Difference]: Without dead ends: 312 [2021-12-17 01:05:05,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 616 SyntacticMatches, 5 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25317 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=7455, Invalid=81051, Unknown=0, NotChecked=0, Total=88506 [2021-12-17 01:05:05,259 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 126 mSDsluCounter, 4917 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 5050 SdHoareTripleChecker+Invalid, 4233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:05:05,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 5050 Invalid, 4233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3679 Invalid, 0 Unknown, 395 Unchecked, 1.4s Time] [2021-12-17 01:05:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-17 01:05:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-12-17 01:05:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 257 states have internal predecessors, (259), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-17 01:05:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 315 transitions. [2021-12-17 01:05:05,344 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 315 transitions. Word has length 315 [2021-12-17 01:05:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:05:05,344 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 315 transitions. [2021-12-17 01:05:05,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 3.1705882352941175) internal successors, (539), 165 states have internal predecessors, (539), 76 states have call successors, (77), 1 states have call predecessors, (77), 2 states have return successors, (78), 78 states have call predecessors, (78), 76 states have call successors, (78) [2021-12-17 01:05:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 315 transitions. [2021-12-17 01:05:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-12-17 01:05:05,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:05:05,346 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 26, 26, 26, 26, 26, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:05:05,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-12-17 01:05:05,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:05:05,546 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:05:05,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:05:05,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1095966793, now seen corresponding path program 76 times [2021-12-17 01:05:05,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:05:05,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178340889] [2021-12-17 01:05:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:05:05,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:05:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:05:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:05:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:05:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:05:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:05:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:05:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:05:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:05:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:05:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:05:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:05:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:05:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:05:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:05:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:05:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:05:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:05:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:05:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:05:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:05:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:05:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:05:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:05:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:05:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:05:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:05:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:05:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:05:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3896 backedges. 75 proven. 2465 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2021-12-17 01:05:06,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:05:06,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178340889] [2021-12-17 01:05:06,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178340889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:05:06,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518807337] [2021-12-17 01:05:06,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:05:06,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:05:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:05:06,822 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:05:06,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-17 01:05:07,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:05:07,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:05:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-17 01:05:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:05:09,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:05:09,624 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:05:09,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:05:09,819 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:05:09,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:05:11,238 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 23 treesize of output 7 [2021-12-17 01:05:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3896 backedges. 274 proven. 2462 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2021-12-17 01:05:11,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:05:11,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:05:11,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:05:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3896 backedges. 75 proven. 2464 refuted. 0 times theorem prover too weak. 1357 trivial. 0 not checked. [2021-12-17 01:05:12,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518807337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:05:12,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:05:12,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 113 [2021-12-17 01:05:12,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340456640] [2021-12-17 01:05:12,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:05:12,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-12-17 01:05:12,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:05:12,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-12-17 01:05:12,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=12218, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 01:05:12,530 INFO L87 Difference]: Start difference. First operand 312 states and 315 transitions. Second operand has 113 states, 113 states have (on average 3.2389380530973453) internal successors, (366), 109 states have internal predecessors, (366), 52 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (55), 54 states have call predecessors, (55), 52 states have call successors, (55) [2021-12-17 01:05:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:05:17,011 INFO L93 Difference]: Finished difference Result 326 states and 329 transitions. [2021-12-17 01:05:17,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-17 01:05:17,012 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.2389380530973453) internal successors, (366), 109 states have internal predecessors, (366), 52 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (55), 54 states have call predecessors, (55), 52 states have call successors, (55) Word has length 319 [2021-12-17 01:05:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:05:17,014 INFO L225 Difference]: With dead ends: 326 [2021-12-17 01:05:17,014 INFO L226 Difference]: Without dead ends: 324 [2021-12-17 01:05:17,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 623 SyntacticMatches, 18 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6984 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=708, Invalid=20462, Unknown=0, NotChecked=0, Total=21170 [2021-12-17 01:05:17,015 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 199 mSDsluCounter, 6226 mSDsCounter, 0 mSdLazyCounter, 11446 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 6318 SdHoareTripleChecker+Invalid, 11818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 11446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 01:05:17,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 6318 Invalid, 11818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 11446 Invalid, 0 Unknown, 169 Unchecked, 3.7s Time] [2021-12-17 01:05:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-17 01:05:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 316. [2021-12-17 01:05:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 261 states have (on average 1.0076628352490422) internal successors, (263), 261 states have internal predecessors, (263), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-17 01:05:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 319 transitions. [2021-12-17 01:05:17,103 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 319 transitions. Word has length 319 [2021-12-17 01:05:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:05:17,103 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 319 transitions. [2021-12-17 01:05:17,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.2389380530973453) internal successors, (366), 109 states have internal predecessors, (366), 52 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (55), 54 states have call predecessors, (55), 52 states have call successors, (55) [2021-12-17 01:05:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 319 transitions. [2021-12-17 01:05:17,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-12-17 01:05:17,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:05:17,117 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 26, 26, 26, 26, 26, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:05:17,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-12-17 01:05:17,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:05:17,318 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:05:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:05:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash -501585619, now seen corresponding path program 77 times [2021-12-17 01:05:17,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:05:17,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030846485] [2021-12-17 01:05:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:05:17,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:05:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:05:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:05:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:05:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:05:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:05:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:05:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:05:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:05:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:05:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:05:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:05:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:05:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:05:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:05:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:05:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:05:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:05:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:05:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:05:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:05:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:05:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:05:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:05:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:05:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:05:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:05:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:05:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:05:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3990 backedges. 78 proven. 2556 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2021-12-17 01:05:18,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:05:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030846485] [2021-12-17 01:05:18,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030846485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:05:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194246347] [2021-12-17 01:05:18,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:05:18,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:05:18,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:05:18,820 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:05:18,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-17 01:05:19,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-12-17 01:05:19,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:05:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-17 01:05:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:05:20,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:05:22,865 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:05:22,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:05:24,224 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 7 [2021-12-17 01:05:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3990 backedges. 180 proven. 2556 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2021-12-17 01:05:24,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:05:24,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194246347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:05:24,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:05:24,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 88 [2021-12-17 01:05:24,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585590472] [2021-12-17 01:05:24,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:05:24,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-17 01:05:24,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:05:24,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-17 01:05:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=7686, Unknown=1, NotChecked=0, Total=8010 [2021-12-17 01:05:24,603 INFO L87 Difference]: Start difference. First operand 316 states and 319 transitions. Second operand has 88 states, 88 states have (on average 3.3068181818181817) internal successors, (291), 85 states have internal predecessors, (291), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2021-12-17 01:05:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:05:29,186 INFO L93 Difference]: Finished difference Result 434 states and 438 transitions. [2021-12-17 01:05:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-17 01:05:29,187 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.3068181818181817) internal successors, (291), 85 states have internal predecessors, (291), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 323 [2021-12-17 01:05:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:05:29,188 INFO L225 Difference]: With dead ends: 434 [2021-12-17 01:05:29,188 INFO L226 Difference]: Without dead ends: 432 [2021-12-17 01:05:29,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 435 SyntacticMatches, 20 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4691 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=604, Invalid=14401, Unknown=1, NotChecked=0, Total=15006 [2021-12-17 01:05:29,190 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 123 mSDsluCounter, 5416 mSDsCounter, 0 mSdLazyCounter, 10567 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 5505 SdHoareTripleChecker+Invalid, 10996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 10567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 01:05:29,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 5505 Invalid, 10996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 10567 Invalid, 0 Unknown, 317 Unchecked, 3.7s Time] [2021-12-17 01:05:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-12-17 01:05:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 329. [2021-12-17 01:05:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 29 states have call successors, (29), 27 states have call predecessors, (29), 27 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 01:05:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 333 transitions. [2021-12-17 01:05:29,299 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 333 transitions. Word has length 323 [2021-12-17 01:05:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:05:29,300 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 333 transitions. [2021-12-17 01:05:29,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.3068181818181817) internal successors, (291), 85 states have internal predecessors, (291), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2021-12-17 01:05:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 333 transitions. [2021-12-17 01:05:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-17 01:05:29,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:05:29,301 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 26, 26, 26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:05:29,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-12-17 01:05:29,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:05:29,522 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:05:29,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:05:29,522 INFO L85 PathProgramCache]: Analyzing trace with hash 404375459, now seen corresponding path program 78 times [2021-12-17 01:05:29,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:05:29,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557380692] [2021-12-17 01:05:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:05:29,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:05:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:05:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:05:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:05:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:05:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:05:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:05:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:05:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:05:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:05:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:05:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:05:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:05:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:05:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:05:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:05:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:05:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:05:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:05:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:05:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:05:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:05:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:05:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:05:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:05:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:05:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:05:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:05:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:05:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4088 backedges. 81 proven. 2651 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2021-12-17 01:05:30,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:05:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557380692] [2021-12-17 01:05:30,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557380692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:05:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753217232] [2021-12-17 01:05:30,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:05:30,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:05:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:05:30,964 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:05:30,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-17 01:05:35,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-12-17 01:05:35,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:05:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 01:05:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:05:37,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:05:40,440 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:05:40,440 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 25 treesize of output 12 [2021-12-17 01:05:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4088 backedges. 1306 proven. 1426 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2021-12-17 01:05:40,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:05:43,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:05:43,588 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 42 treesize of output 36 [2021-12-17 01:05:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4088 backedges. 1281 proven. 1451 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2021-12-17 01:05:46,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753217232] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:05:46,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:05:46,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 177 [2021-12-17 01:05:46,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143561329] [2021-12-17 01:05:46,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:05:46,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2021-12-17 01:05:46,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:05:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2021-12-17 01:05:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3097, Invalid=28055, Unknown=0, NotChecked=0, Total=31152 [2021-12-17 01:05:46,527 INFO L87 Difference]: Start difference. First operand 329 states and 333 transitions. Second operand has 177 states, 176 states have (on average 3.1818181818181817) internal successors, (560), 172 states have internal predecessors, (560), 79 states have call successors, (80), 1 states have call predecessors, (80), 2 states have return successors, (81), 81 states have call predecessors, (81), 79 states have call successors, (81) [2021-12-17 01:05:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:05:56,869 INFO L93 Difference]: Finished difference Result 432 states and 436 transitions. [2021-12-17 01:05:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-12-17 01:05:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 176 states have (on average 3.1818181818181817) internal successors, (560), 172 states have internal predecessors, (560), 79 states have call successors, (80), 1 states have call predecessors, (80), 2 states have return successors, (81), 81 states have call predecessors, (81), 79 states have call successors, (81) Word has length 327 [2021-12-17 01:05:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:05:56,871 INFO L225 Difference]: With dead ends: 432 [2021-12-17 01:05:56,871 INFO L226 Difference]: Without dead ends: 324 [2021-12-17 01:05:56,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 619 SyntacticMatches, 5 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32896 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=8828, Invalid=101728, Unknown=0, NotChecked=0, Total=110556 [2021-12-17 01:05:56,875 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 156 mSDsluCounter, 4093 mSDsCounter, 0 mSdLazyCounter, 4677 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 4184 SdHoareTripleChecker+Invalid, 6535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 4677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1714 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 01:05:56,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 4184 Invalid, 6535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 4677 Invalid, 0 Unknown, 1714 Unchecked, 1.7s Time] [2021-12-17 01:05:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-17 01:05:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-12-17 01:05:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 267 states have (on average 1.0074906367041199) internal successors, (269), 267 states have internal predecessors, (269), 29 states have call successors, (29), 27 states have call predecessors, (29), 27 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 01:05:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 327 transitions. [2021-12-17 01:05:56,960 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 327 transitions. Word has length 327 [2021-12-17 01:05:56,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:05:56,960 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 327 transitions. [2021-12-17 01:05:56,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 176 states have (on average 3.1818181818181817) internal successors, (560), 172 states have internal predecessors, (560), 79 states have call successors, (80), 1 states have call predecessors, (80), 2 states have return successors, (81), 81 states have call predecessors, (81), 79 states have call successors, (81) [2021-12-17 01:05:56,960 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 327 transitions. [2021-12-17 01:05:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-17 01:05:56,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:05:56,962 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 27, 27, 27, 27, 27, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:05:56,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-12-17 01:05:57,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:05:57,162 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:05:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:05:57,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1900101360, now seen corresponding path program 79 times [2021-12-17 01:05:57,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:05:57,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130583067] [2021-12-17 01:05:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:05:57,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:05:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:05:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:05:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:05:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:05:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:05:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:05:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:05:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:05:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:05:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:05:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:05:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:05:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:05:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:05:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:05:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:05:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:05:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:05:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:05:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:05:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:05:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:05:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:05:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:05:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:05:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:05:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:05:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:05:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:05:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 78 proven. 2667 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2021-12-17 01:05:58,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:05:58,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130583067] [2021-12-17 01:05:58,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130583067] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:05:58,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172352049] [2021-12-17 01:05:58,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:05:58,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:05:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:05:58,601 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:05:58,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-17 01:05:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:05:58,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-17 01:05:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:06:00,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:06:00,982 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:06:00,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:06:01,160 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:06:01,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:06:02,604 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 7 [2021-12-17 01:06:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 285 proven. 2664 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2021-12-17 01:06:02,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:06:03,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:06:03,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:06:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 78 proven. 2666 refuted. 0 times theorem prover too weak. 1463 trivial. 0 not checked. [2021-12-17 01:06:03,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172352049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:06:03,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:06:03,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 117 [2021-12-17 01:06:03,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812591255] [2021-12-17 01:06:03,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:06:03,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-17 01:06:03,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:06:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-17 01:06:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=13118, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 01:06:03,926 INFO L87 Difference]: Start difference. First operand 324 states and 327 transitions. Second operand has 117 states, 117 states have (on average 3.247863247863248) internal successors, (380), 113 states have internal predecessors, (380), 54 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (57), 56 states have call predecessors, (57), 54 states have call successors, (57) [2021-12-17 01:06:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:06:08,685 INFO L93 Difference]: Finished difference Result 338 states and 341 transitions. [2021-12-17 01:06:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-17 01:06:08,685 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.247863247863248) internal successors, (380), 113 states have internal predecessors, (380), 54 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (57), 56 states have call predecessors, (57), 54 states have call successors, (57) Word has length 331 [2021-12-17 01:06:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:06:08,686 INFO L225 Difference]: With dead ends: 338 [2021-12-17 01:06:08,686 INFO L226 Difference]: Without dead ends: 336 [2021-12-17 01:06:08,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 646 SyntacticMatches, 20 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7477 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=732, Invalid=21918, Unknown=0, NotChecked=0, Total=22650 [2021-12-17 01:06:08,687 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 202 mSDsluCounter, 6337 mSDsCounter, 0 mSdLazyCounter, 12668 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 6432 SdHoareTripleChecker+Invalid, 13055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 12668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:06:08,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 6432 Invalid, 13055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 12668 Invalid, 0 Unknown, 179 Unchecked, 3.9s Time] [2021-12-17 01:06:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-17 01:06:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2021-12-17 01:06:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 271 states have (on average 1.007380073800738) internal successors, (273), 271 states have internal predecessors, (273), 29 states have call successors, (29), 27 states have call predecessors, (29), 27 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 01:06:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 331 transitions. [2021-12-17 01:06:08,776 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 331 transitions. Word has length 331 [2021-12-17 01:06:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:06:08,776 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 331 transitions. [2021-12-17 01:06:08,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.247863247863248) internal successors, (380), 113 states have internal predecessors, (380), 54 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (57), 56 states have call predecessors, (57), 54 states have call successors, (57) [2021-12-17 01:06:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 331 transitions. [2021-12-17 01:06:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-17 01:06:08,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:06:08,778 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 27, 27, 27, 27, 27, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:06:08,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-12-17 01:06:08,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-12-17 01:06:08,978 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:06:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:06:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1753908198, now seen corresponding path program 80 times [2021-12-17 01:06:08,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:06:08,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097295462] [2021-12-17 01:06:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:06:08,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:06:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:06:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:06:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:06:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:06:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:06:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:06:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:06:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:06:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:06:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:06:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:06:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:06:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:06:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:06:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:06:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:06:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:06:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:06:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:06:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:06:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:06:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:06:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:06:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:06:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:06:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:06:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:06:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:06:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:06:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 81 proven. 2762 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2021-12-17 01:06:10,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:06:10,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097295462] [2021-12-17 01:06:10,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097295462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:06:10,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148916958] [2021-12-17 01:06:10,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:06:10,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:06:10,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:06:10,386 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:06:10,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-17 01:06:10,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:06:10,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:06:10,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-17 01:06:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:06:12,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:06:15,040 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:06:15,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:06:16,602 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 7 [2021-12-17 01:06:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 187 proven. 2762 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2021-12-17 01:06:16,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:06:17,043 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 20 treesize of output 18 [2021-12-17 01:06:17,045 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 36 treesize of output 32 [2021-12-17 01:06:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 81 proven. 2762 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2021-12-17 01:06:17,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148916958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:06:17,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:06:17,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 120 [2021-12-17 01:06:17,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071921505] [2021-12-17 01:06:17,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:06:17,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-12-17 01:06:17,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:06:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-12-17 01:06:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=13816, Unknown=1, NotChecked=0, Total=14280 [2021-12-17 01:06:17,900 INFO L87 Difference]: Start difference. First operand 328 states and 331 transitions. Second operand has 120 states, 120 states have (on average 3.2416666666666667) internal successors, (389), 116 states have internal predecessors, (389), 55 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) [2021-12-17 01:06:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:06:24,170 INFO L93 Difference]: Finished difference Result 444 states and 448 transitions. [2021-12-17 01:06:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-17 01:06:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.2416666666666667) internal successors, (389), 116 states have internal predecessors, (389), 55 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) Word has length 335 [2021-12-17 01:06:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:06:24,172 INFO L225 Difference]: With dead ends: 444 [2021-12-17 01:06:24,172 INFO L226 Difference]: Without dead ends: 442 [2021-12-17 01:06:24,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 678 SyntacticMatches, 16 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7215 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=716, Invalid=22234, Unknown=2, NotChecked=0, Total=22952 [2021-12-17 01:06:24,173 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 224 mSDsluCounter, 4461 mSDsCounter, 0 mSdLazyCounter, 11078 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 11337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 11078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:06:24,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 4554 Invalid, 11337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 11078 Invalid, 0 Unknown, 196 Unchecked, 3.4s Time] [2021-12-17 01:06:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-17 01:06:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 341. [2021-12-17 01:06:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 30 states have call successors, (30), 28 states have call predecessors, (30), 28 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-17 01:06:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 345 transitions. [2021-12-17 01:06:24,302 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 345 transitions. Word has length 335 [2021-12-17 01:06:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:06:24,302 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 345 transitions. [2021-12-17 01:06:24,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.2416666666666667) internal successors, (389), 116 states have internal predecessors, (389), 55 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) [2021-12-17 01:06:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 345 transitions. [2021-12-17 01:06:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-12-17 01:06:24,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:06:24,304 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 27, 27, 27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:06:24,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-12-17 01:06:24,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:06:24,504 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:06:24,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:06:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1595694556, now seen corresponding path program 81 times [2021-12-17 01:06:24,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:06:24,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094988348] [2021-12-17 01:06:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:06:24,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:06:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:06:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:06:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:06:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:06:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:06:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:06:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:06:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:06:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:06:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:06:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:06:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:06:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:06:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:06:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:06:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:06:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:06:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:06:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:06:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:06:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:06:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:06:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:06:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:06:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:06:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:06:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:06:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:06:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:06:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4407 backedges. 84 proven. 2861 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2021-12-17 01:06:25,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:06:25,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094988348] [2021-12-17 01:06:25,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094988348] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:06:25,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012239585] [2021-12-17 01:06:25,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:06:25,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:06:25,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:06:25,912 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:06:25,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-17 01:06:32,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-12-17 01:06:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:06:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-17 01:06:32,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:06:34,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:06:37,625 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:06:37,625 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 25 treesize of output 12 [2021-12-17 01:06:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4407 backedges. 1410 proven. 1535 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2021-12-17 01:06:37,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:06:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:06:40,828 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 42 treesize of output 36 [2021-12-17 01:06:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4407 backedges. 1384 proven. 1561 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2021-12-17 01:06:43,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012239585] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:06:43,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:06:43,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 64, 64] total 182 [2021-12-17 01:06:43,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959375694] [2021-12-17 01:06:43,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:06:43,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2021-12-17 01:06:43,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:06:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2021-12-17 01:06:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3305, Invalid=29637, Unknown=0, NotChecked=0, Total=32942 [2021-12-17 01:06:43,917 INFO L87 Difference]: Start difference. First operand 341 states and 345 transitions. Second operand has 182 states, 182 states have (on average 3.1923076923076925) internal successors, (581), 177 states have internal predecessors, (581), 82 states have call successors, (83), 1 states have call predecessors, (83), 2 states have return successors, (84), 84 states have call predecessors, (84), 82 states have call successors, (84) [2021-12-17 01:06:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:06:55,137 INFO L93 Difference]: Finished difference Result 448 states and 452 transitions. [2021-12-17 01:06:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-12-17 01:06:55,138 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 3.1923076923076925) internal successors, (581), 177 states have internal predecessors, (581), 82 states have call successors, (83), 1 states have call predecessors, (83), 2 states have return successors, (84), 84 states have call predecessors, (84), 82 states have call successors, (84) Word has length 339 [2021-12-17 01:06:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:06:55,139 INFO L225 Difference]: With dead ends: 448 [2021-12-17 01:06:55,139 INFO L226 Difference]: Without dead ends: 336 [2021-12-17 01:06:55,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 643 SyntacticMatches, 5 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35175 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=9416, Invalid=108576, Unknown=0, NotChecked=0, Total=117992 [2021-12-17 01:06:55,144 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 215 mSDsluCounter, 4017 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 4111 SdHoareTripleChecker+Invalid, 5946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 4742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 981 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:06:55,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 4111 Invalid, 5946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 4742 Invalid, 0 Unknown, 981 Unchecked, 1.9s Time] [2021-12-17 01:06:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-17 01:06:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2021-12-17 01:06:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 277 states have (on average 1.0072202166064983) internal successors, (279), 277 states have internal predecessors, (279), 30 states have call successors, (30), 28 states have call predecessors, (30), 28 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-17 01:06:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 339 transitions. [2021-12-17 01:06:55,234 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 339 transitions. Word has length 339 [2021-12-17 01:06:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:06:55,235 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 339 transitions. [2021-12-17 01:06:55,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 3.1923076923076925) internal successors, (581), 177 states have internal predecessors, (581), 82 states have call successors, (83), 1 states have call predecessors, (83), 2 states have return successors, (84), 84 states have call predecessors, (84), 82 states have call successors, (84) [2021-12-17 01:06:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 339 transitions. [2021-12-17 01:06:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-12-17 01:06:55,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:06:55,236 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 28, 28, 28, 28, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:06:55,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-12-17 01:06:55,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:06:55,437 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:06:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:06:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 552062249, now seen corresponding path program 82 times [2021-12-17 01:06:55,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:06:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551320788] [2021-12-17 01:06:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:06:55,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:06:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:06:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:06:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:06:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:06:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:06:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:06:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:06:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:06:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:06:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:06:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:06:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:06:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:06:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:06:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:06:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:06:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:06:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:06:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:06:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:06:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:06:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:06:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:06:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:06:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:06:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:06:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:06:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:06:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:06:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-12-17 01:06:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:06:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 81 proven. 2877 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2021-12-17 01:06:56,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:06:56,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551320788] [2021-12-17 01:06:56,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551320788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:06:56,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910423075] [2021-12-17 01:06:56,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:06:56,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:06:56,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:06:56,902 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:06:56,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-17 01:06:58,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:06:58,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:06:58,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-17 01:06:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:00,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:07:00,687 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:07:00,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:07:00,871 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:07:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:07:02,452 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 7 [2021-12-17 01:07:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 296 proven. 2874 refuted. 0 times theorem prover too weak. 1360 trivial. 0 not checked. [2021-12-17 01:07:02,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:02,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:07:02,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:07:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 81 proven. 2876 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2021-12-17 01:07:03,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910423075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:07:03,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:07:03,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 123 [2021-12-17 01:07:03,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28560707] [2021-12-17 01:07:03,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:03,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-12-17 01:07:03,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-12-17 01:07:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=14527, Unknown=0, NotChecked=0, Total=15006 [2021-12-17 01:07:03,851 INFO L87 Difference]: Start difference. First operand 336 states and 339 transitions. Second operand has 123 states, 122 states have (on average 3.237704918032787) internal successors, (395), 118 states have internal predecessors, (395), 57 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (60), 59 states have call predecessors, (60), 57 states have call successors, (60) [2021-12-17 01:07:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:09,205 INFO L93 Difference]: Finished difference Result 350 states and 353 transitions. [2021-12-17 01:07:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-17 01:07:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 122 states have (on average 3.237704918032787) internal successors, (395), 118 states have internal predecessors, (395), 57 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (60), 59 states have call predecessors, (60), 57 states have call successors, (60) Word has length 343 [2021-12-17 01:07:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:09,206 INFO L225 Difference]: With dead ends: 350 [2021-12-17 01:07:09,207 INFO L226 Difference]: Without dead ends: 348 [2021-12-17 01:07:09,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 671 SyntacticMatches, 18 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8137 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=767, Invalid=24039, Unknown=0, NotChecked=0, Total=24806 [2021-12-17 01:07:09,208 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 268 mSDsluCounter, 6055 mSDsCounter, 0 mSdLazyCounter, 13679 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 14122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 13679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:09,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 6153 Invalid, 14122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 13679 Invalid, 0 Unknown, 175 Unchecked, 4.4s Time] [2021-12-17 01:07:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-17 01:07:09,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 340. [2021-12-17 01:07:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 281 states have (on average 1.00711743772242) internal successors, (283), 281 states have internal predecessors, (283), 30 states have call successors, (30), 28 states have call predecessors, (30), 28 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-17 01:07:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 343 transitions. [2021-12-17 01:07:09,299 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 343 transitions. Word has length 343 [2021-12-17 01:07:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:09,300 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 343 transitions. [2021-12-17 01:07:09,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 122 states have (on average 3.237704918032787) internal successors, (395), 118 states have internal predecessors, (395), 57 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (60), 59 states have call predecessors, (60), 57 states have call successors, (60) [2021-12-17 01:07:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 343 transitions. [2021-12-17 01:07:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-17 01:07:09,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:09,301 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 28, 28, 28, 28, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:09,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-12-17 01:07:09,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:09,502 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:09,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1453503073, now seen corresponding path program 83 times [2021-12-17 01:07:09,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:09,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236674409] [2021-12-17 01:07:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:09,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:10,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:07:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:07:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:07:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:07:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:07:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:07:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:07:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:07:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:07:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:07:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:07:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:07:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:07:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:07:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:07:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:07:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:07:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:07:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:07:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:07:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:07:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:07:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:07:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:07:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:07:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:07:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:07:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-12-17 01:07:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 84 proven. 2976 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2021-12-17 01:07:11,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:11,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236674409] [2021-12-17 01:07:11,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236674409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:11,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333592724] [2021-12-17 01:07:11,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:07:11,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:11,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:11,099 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:11,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-17 01:07:11,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-12-17 01:07:11,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:07:11,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-17 01:07:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:07:13,259 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:07:13,260 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 [2021-12-17 01:07:14,840 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 9 [2021-12-17 01:07:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 194 proven. 2976 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2021-12-17 01:07:14,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:15,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333592724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:15,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:07:15,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 94 [2021-12-17 01:07:15,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671966827] [2021-12-17 01:07:15,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:15,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-17 01:07:15,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:15,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-17 01:07:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=8775, Unknown=0, NotChecked=0, Total=9120 [2021-12-17 01:07:15,267 INFO L87 Difference]: Start difference. First operand 340 states and 343 transitions. Second operand has 94 states, 94 states have (on average 3.3297872340425534) internal successors, (313), 91 states have internal predecessors, (313), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (32), 32 states have call predecessors, (32), 30 states have call successors, (32) [2021-12-17 01:07:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:19,343 INFO L93 Difference]: Finished difference Result 466 states and 470 transitions. [2021-12-17 01:07:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-17 01:07:19,344 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.3297872340425534) internal successors, (313), 91 states have internal predecessors, (313), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (32), 32 states have call predecessors, (32), 30 states have call successors, (32) Word has length 347 [2021-12-17 01:07:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:19,345 INFO L225 Difference]: With dead ends: 466 [2021-12-17 01:07:19,345 INFO L226 Difference]: Without dead ends: 464 [2021-12-17 01:07:19,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 468 SyntacticMatches, 21 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5323 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=644, Invalid=16386, Unknown=0, NotChecked=0, Total=17030 [2021-12-17 01:07:19,346 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 130 mSDsluCounter, 3634 mSDsCounter, 0 mSdLazyCounter, 9734 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 3729 SdHoareTripleChecker+Invalid, 10102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 9734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:19,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 3729 Invalid, 10102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 9734 Invalid, 0 Unknown, 247 Unchecked, 3.2s Time] [2021-12-17 01:07:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-17 01:07:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 353. [2021-12-17 01:07:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 292 states have (on average 1.0102739726027397) internal successors, (295), 292 states have internal predecessors, (295), 31 states have call successors, (31), 29 states have call predecessors, (31), 29 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 01:07:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 357 transitions. [2021-12-17 01:07:19,443 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 357 transitions. Word has length 347 [2021-12-17 01:07:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:19,444 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 357 transitions. [2021-12-17 01:07:19,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.3297872340425534) internal successors, (313), 91 states have internal predecessors, (313), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (32), 32 states have call predecessors, (32), 30 states have call successors, (32) [2021-12-17 01:07:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 357 transitions. [2021-12-17 01:07:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-17 01:07:19,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:19,446 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 28, 28, 28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:19,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-12-17 01:07:19,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:19,669 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash 26321685, now seen corresponding path program 84 times [2021-12-17 01:07:19,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:19,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752013980] [2021-12-17 01:07:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:19,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:07:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:07:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:07:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:07:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:07:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:07:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:07:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:07:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:07:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:07:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:07:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:07:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:07:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:07:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:07:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:07:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:07:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:07:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:07:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:07:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:07:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:07:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:07:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:07:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:07:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:07:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:07:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-12-17 01:07:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4738 backedges. 87 proven. 3079 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2021-12-17 01:07:21,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:21,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752013980] [2021-12-17 01:07:21,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752013980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:21,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615206052] [2021-12-17 01:07:21,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:07:21,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:21,251 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:21,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-17 01:07:26,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-12-17 01:07:26,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:07:26,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-17 01:07:26,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:29,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:07:32,208 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:07:32,208 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 25 treesize of output 12 [2021-12-17 01:07:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4738 backedges. 1518 proven. 1648 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2021-12-17 01:07:32,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:07:35,595 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 42 treesize of output 36 [2021-12-17 01:07:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4738 backedges. 1491 proven. 1675 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2021-12-17 01:07:38,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615206052] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:07:38,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:07:38,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 189 [2021-12-17 01:07:38,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860340741] [2021-12-17 01:07:38,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:38,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2021-12-17 01:07:38,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2021-12-17 01:07:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3526, Invalid=32006, Unknown=0, NotChecked=0, Total=35532 [2021-12-17 01:07:38,910 INFO L87 Difference]: Start difference. First operand 353 states and 357 transitions. Second operand has 189 states, 188 states have (on average 3.202127659574468) internal successors, (602), 184 states have internal predecessors, (602), 85 states have call successors, (86), 1 states have call predecessors, (86), 2 states have return successors, (87), 87 states have call predecessors, (87), 85 states have call successors, (87) [2021-12-17 01:07:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:49,840 INFO L93 Difference]: Finished difference Result 464 states and 468 transitions. [2021-12-17 01:07:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-12-17 01:07:49,841 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 188 states have (on average 3.202127659574468) internal successors, (602), 184 states have internal predecessors, (602), 85 states have call successors, (86), 1 states have call predecessors, (86), 2 states have return successors, (87), 87 states have call predecessors, (87), 85 states have call successors, (87) Word has length 351 [2021-12-17 01:07:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:49,842 INFO L225 Difference]: With dead ends: 464 [2021-12-17 01:07:49,842 INFO L226 Difference]: Without dead ends: 348 [2021-12-17 01:07:49,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 689 SyntacticMatches, 5 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31560 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=9051, Invalid=100841, Unknown=0, NotChecked=0, Total=109892 [2021-12-17 01:07:49,848 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 213 mSDsluCounter, 3864 mSDsCounter, 0 mSdLazyCounter, 4848 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3957 SdHoareTripleChecker+Invalid, 5616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 4848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 624 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:49,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 3957 Invalid, 5616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 4848 Invalid, 0 Unknown, 624 Unchecked, 1.8s Time] [2021-12-17 01:07:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-17 01:07:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2021-12-17 01:07:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 287 states have (on average 1.0069686411149825) internal successors, (289), 287 states have internal predecessors, (289), 31 states have call successors, (31), 29 states have call predecessors, (31), 29 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 01:07:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 351 transitions. [2021-12-17 01:07:49,946 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 351 transitions. Word has length 351 [2021-12-17 01:07:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:49,946 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 351 transitions. [2021-12-17 01:07:49,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 188 states have (on average 3.202127659574468) internal successors, (602), 184 states have internal predecessors, (602), 85 states have call successors, (86), 1 states have call predecessors, (86), 2 states have return successors, (87), 87 states have call predecessors, (87), 85 states have call successors, (87) [2021-12-17 01:07:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 351 transitions. [2021-12-17 01:07:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-17 01:07:49,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:49,948 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 29, 29, 29, 29, 29, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:49,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-12-17 01:07:50,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:50,148 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2023765406, now seen corresponding path program 85 times [2021-12-17 01:07:50,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:50,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745250295] [2021-12-17 01:07:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:50,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:07:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:07:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:07:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:07:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:07:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:07:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:07:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:07:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:07:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:07:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:07:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:07:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:07:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:07:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:07:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:07:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:07:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:07:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:07:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:07:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:07:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:07:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:07:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:07:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:07:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:07:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:07:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-12-17 01:07:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2021-12-17 01:07:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 84 proven. 3095 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2021-12-17 01:07:51,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:51,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745250295] [2021-12-17 01:07:51,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745250295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:51,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028444529] [2021-12-17 01:07:51,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:07:51,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:51,832 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:51,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-17 01:07:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:52,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-17 01:07:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:53,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:07:53,576 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:07:53,576 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 [2021-12-17 01:07:53,836 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:07:53,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-17 01:07:55,288 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 9 [2021-12-17 01:07:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 307 proven. 3092 refuted. 0 times theorem prover too weak. 1466 trivial. 0 not checked. [2021-12-17 01:07:55,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:55,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028444529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:55,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:07:55,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 96 [2021-12-17 01:07:55,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830760703] [2021-12-17 01:07:55,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:55,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-17 01:07:55,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:55,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-17 01:07:55,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=9147, Unknown=0, NotChecked=0, Total=9506 [2021-12-17 01:07:55,683 INFO L87 Difference]: Start difference. First operand 348 states and 351 transitions. Second operand has 96 states, 96 states have (on average 3.3229166666666665) internal successors, (319), 93 states have internal predecessors, (319), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) [2021-12-17 01:08:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:00,629 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2021-12-17 01:08:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-17 01:08:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.3229166666666665) internal successors, (319), 93 states have internal predecessors, (319), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) Word has length 355 [2021-12-17 01:08:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:00,631 INFO L225 Difference]: With dead ends: 357 [2021-12-17 01:08:00,631 INFO L226 Difference]: Without dead ends: 355 [2021-12-17 01:08:00,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 477 SyntacticMatches, 23 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5770 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=660, Invalid=16896, Unknown=0, NotChecked=0, Total=17556 [2021-12-17 01:08:00,632 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 154 mSDsluCounter, 5335 mSDsCounter, 0 mSdLazyCounter, 11493 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 5430 SdHoareTripleChecker+Invalid, 12041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 11493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:00,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 5430 Invalid, 12041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 11493 Invalid, 0 Unknown, 377 Unchecked, 4.0s Time] [2021-12-17 01:08:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-17 01:08:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2021-12-17 01:08:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 291 states have (on average 1.006872852233677) internal successors, (293), 291 states have internal predecessors, (293), 31 states have call successors, (31), 29 states have call predecessors, (31), 29 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 01:08:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 355 transitions. [2021-12-17 01:08:00,728 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 355 transitions. Word has length 355 [2021-12-17 01:08:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:00,728 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 355 transitions. [2021-12-17 01:08:00,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.3229166666666665) internal successors, (319), 93 states have internal predecessors, (319), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 34 states have call predecessors, (34), 32 states have call successors, (34) [2021-12-17 01:08:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 355 transitions. [2021-12-17 01:08:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-17 01:08:00,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:00,729 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 29, 29, 29, 29, 29, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:00,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:00,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-12-17 01:08:00,930 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash -323877288, now seen corresponding path program 86 times [2021-12-17 01:08:00,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:00,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303310932] [2021-12-17 01:08:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:00,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:08:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:08:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:08:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:08:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:08:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:08:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:08:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:08:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:08:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:08:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:08:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:08:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:08:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:08:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:08:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:08:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:08:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:08:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:08:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:08:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:08:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:08:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:08:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:08:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:08:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:08:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:08:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:08:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:08:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-12-17 01:08:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2021-12-17 01:08:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 87 proven. 3198 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2021-12-17 01:08:02,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:02,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303310932] [2021-12-17 01:08:02,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303310932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:02,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491809248] [2021-12-17 01:08:02,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:08:02,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:02,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:02,714 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:08:02,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-17 01:08:03,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:08:03,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-17 01:08:03,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:05,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:08:05,671 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:08:05,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:08:07,492 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 7 [2021-12-17 01:08:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 201 proven. 3198 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2021-12-17 01:08:07,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:07,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:08:07,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-17 01:08:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 87 proven. 3198 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2021-12-17 01:08:09,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491809248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:08:09,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:08:09,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 130 [2021-12-17 01:08:09,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831868675] [2021-12-17 01:08:09,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:09,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-12-17 01:08:09,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:09,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-12-17 01:08:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=16266, Unknown=0, NotChecked=0, Total=16770 [2021-12-17 01:08:09,016 INFO L87 Difference]: Start difference. First operand 352 states and 355 transitions. Second operand has 130 states, 129 states have (on average 3.24031007751938) internal successors, (418), 125 states have internal predecessors, (418), 60 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (62), 62 states have call predecessors, (62), 60 states have call successors, (62) [2021-12-17 01:08:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:13,828 INFO L93 Difference]: Finished difference Result 476 states and 480 transitions. [2021-12-17 01:08:13,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-17 01:08:13,828 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 3.24031007751938) internal successors, (418), 125 states have internal predecessors, (418), 60 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (62), 62 states have call predecessors, (62), 60 states have call successors, (62) Word has length 359 [2021-12-17 01:08:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:13,829 INFO L225 Difference]: With dead ends: 476 [2021-12-17 01:08:13,829 INFO L226 Difference]: Without dead ends: 474 [2021-12-17 01:08:13,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 729 SyntacticMatches, 14 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8349 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=775, Invalid=25957, Unknown=0, NotChecked=0, Total=26732 [2021-12-17 01:08:13,831 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 242 mSDsluCounter, 6143 mSDsCounter, 0 mSdLazyCounter, 11826 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 6242 SdHoareTripleChecker+Invalid, 12111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 11826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:13,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 6242 Invalid, 12111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 11826 Invalid, 0 Unknown, 215 Unchecked, 3.8s Time] [2021-12-17 01:08:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-17 01:08:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 365. [2021-12-17 01:08:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 states have internal predecessors, (305), 32 states have call successors, (32), 30 states have call predecessors, (32), 30 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-17 01:08:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 369 transitions. [2021-12-17 01:08:13,935 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 369 transitions. Word has length 359 [2021-12-17 01:08:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:13,935 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 369 transitions. [2021-12-17 01:08:13,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 3.24031007751938) internal successors, (418), 125 states have internal predecessors, (418), 60 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (62), 62 states have call predecessors, (62), 60 states have call successors, (62) [2021-12-17 01:08:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 369 transitions. [2021-12-17 01:08:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-12-17 01:08:13,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:13,937 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 29, 29, 29, 29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:13,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:14,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:14,138 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1510385842, now seen corresponding path program 87 times [2021-12-17 01:08:14,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:14,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299150068] [2021-12-17 01:08:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:14,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:08:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:08:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:08:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:08:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:08:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:08:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:08:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:08:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:08:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:08:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:08:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:08:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:08:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:08:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:08:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:08:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:08:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:08:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:08:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:08:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:08:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:08:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:08:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:08:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:08:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:08:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:08:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:08:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:08:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-12-17 01:08:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2021-12-17 01:08:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5081 backedges. 90 proven. 3305 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2021-12-17 01:08:15,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:15,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299150068] [2021-12-17 01:08:15,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299150068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:15,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644423276] [2021-12-17 01:08:15,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:08:15,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:15,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:15,929 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:08:15,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-17 01:08:24,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-17 01:08:24,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-17 01:08:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:27,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:08:30,252 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:08:30,252 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 25 treesize of output 12 [2021-12-17 01:08:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5081 backedges. 1630 proven. 1765 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2021-12-17 01:08:30,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 01:08:33,950 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 42 treesize of output 36 [2021-12-17 01:08:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5081 backedges. 1602 proven. 1793 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2021-12-17 01:08:37,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644423276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:08:37,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:08:37,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 68, 68] total 194 [2021-12-17 01:08:37,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839255099] [2021-12-17 01:08:37,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:37,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-12-17 01:08:37,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-12-17 01:08:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4217, Invalid=33225, Unknown=0, NotChecked=0, Total=37442 [2021-12-17 01:08:37,343 INFO L87 Difference]: Start difference. First operand 365 states and 369 transitions. Second operand has 194 states, 194 states have (on average 3.211340206185567) internal successors, (623), 189 states have internal predecessors, (623), 88 states have call successors, (89), 1 states have call predecessors, (89), 2 states have return successors, (90), 90 states have call predecessors, (90), 88 states have call successors, (90) [2021-12-17 01:08:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:47,256 INFO L93 Difference]: Finished difference Result 480 states and 484 transitions. [2021-12-17 01:08:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-12-17 01:08:47,257 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.211340206185567) internal successors, (623), 189 states have internal predecessors, (623), 88 states have call successors, (89), 1 states have call predecessors, (89), 2 states have return successors, (90), 90 states have call predecessors, (90), 88 states have call successors, (90) Word has length 363 [2021-12-17 01:08:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:47,258 INFO L225 Difference]: With dead ends: 480 [2021-12-17 01:08:47,258 INFO L226 Difference]: Without dead ends: 360 [2021-12-17 01:08:47,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 712 SyntacticMatches, 6 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28911 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=8904, Invalid=88752, Unknown=0, NotChecked=0, Total=97656 [2021-12-17 01:08:47,263 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 135 mSDsluCounter, 4556 mSDsCounter, 0 mSdLazyCounter, 5361 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4652 SdHoareTripleChecker+Invalid, 5967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 5361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:47,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 4652 Invalid, 5967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 5361 Invalid, 0 Unknown, 423 Unchecked, 1.9s Time] [2021-12-17 01:08:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-17 01:08:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-12-17 01:08:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 297 states have (on average 1.0067340067340067) internal successors, (299), 297 states have internal predecessors, (299), 32 states have call successors, (32), 30 states have call predecessors, (32), 30 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-17 01:08:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 363 transitions. [2021-12-17 01:08:47,368 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 363 transitions. Word has length 363 [2021-12-17 01:08:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:47,368 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 363 transitions. [2021-12-17 01:08:47,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.211340206185567) internal successors, (623), 189 states have internal predecessors, (623), 88 states have call successors, (89), 1 states have call predecessors, (89), 2 states have return successors, (90), 90 states have call predecessors, (90), 88 states have call successors, (90) [2021-12-17 01:08:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 363 transitions. [2021-12-17 01:08:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-17 01:08:47,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:47,370 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 30, 30, 30, 30, 30, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:47,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:47,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:47,573 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash -56068453, now seen corresponding path program 88 times [2021-12-17 01:08:47,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865972808] [2021-12-17 01:08:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:47,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:08:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:08:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 01:08:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 01:08:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 01:08:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 01:08:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 01:08:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 01:08:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 01:08:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 01:08:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 01:08:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 01:08:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 01:08:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 01:08:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 01:08:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 01:08:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 01:08:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 01:08:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 01:08:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 01:08:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-17 01:08:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 01:08:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 01:08:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-17 01:08:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 01:08:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-17 01:08:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-17 01:08:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-17 01:08:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-17 01:08:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-12-17 01:08:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2021-12-17 01:08:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2021-12-17 01:08:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 87 proven. 3321 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2021-12-17 01:08:49,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865972808] [2021-12-17 01:08:49,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865972808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33167062] [2021-12-17 01:08:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:08:49,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:49,407 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:08:49,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-17 01:08:51,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:08:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-17 01:08:51,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15