./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 [2021-12-15 21:46:32,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:46:32,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:46:32,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:46:32,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:46:32,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:46:32,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:46:32,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:46:32,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:46:32,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:46:32,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:46:32,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:46:32,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:46:32,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:46:32,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:46:32,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:46:32,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:46:32,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:46:32,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:46:32,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:46:32,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:46:32,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:46:32,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:46:32,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:46:32,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:46:32,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:46:32,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:46:32,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:46:32,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:46:32,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:46:32,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:46:32,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:46:32,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:46:32,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:46:32,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:46:32,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:46:32,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:46:32,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:46:32,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:46:32,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:46:32,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:46:32,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:46:32,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:46:32,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:46:32,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:46:32,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:46:32,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:46:32,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:46:32,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:46:32,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:46:32,537 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:46:32,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:46:32,538 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:46:32,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:46:32,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:46:32,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:46:32,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:46:32,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:46:32,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:46:32,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:46:32,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:46:32,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:46:32,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:46:32,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:46:32,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:46:32,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:46:32,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:46:32,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:46:32,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:46:32,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:46:32,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:46:32,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:46:32,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:46:32,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:46:32,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:46:32,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:46:32,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2021-12-15 21:46:32,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:46:32,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:46:32,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:46:32,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:46:32,734 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:46:32,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2021-12-15 21:46:32,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41a53565d/b1f2bc0eb0b14b19843bc9c7c51f682c/FLAG50fee79c0 [2021-12-15 21:46:33,141 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:46:33,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2021-12-15 21:46:33,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41a53565d/b1f2bc0eb0b14b19843bc9c7c51f682c/FLAG50fee79c0 [2021-12-15 21:46:33,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41a53565d/b1f2bc0eb0b14b19843bc9c7c51f682c [2021-12-15 21:46:33,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:46:33,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:46:33,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:46:33,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:46:33,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:46:33,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f9c4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33, skipping insertion in model container [2021-12-15 21:46:33,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:46:33,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:46:33,346 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] [2021-12-15 21:46:33,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:46:33,370 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:46:33,380 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] [2021-12-15 21:46:33,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:46:33,401 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:46:33,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33 WrapperNode [2021-12-15 21:46:33,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:46:33,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:46:33,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:46:33,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:46:33,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,430 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-12-15 21:46:33,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:46:33,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:46:33,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:46:33,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:46:33,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:46:33,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:46:33,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:46:33,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:46:33,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (1/1) ... [2021-12-15 21:46:33,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:46:33,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:33,491 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) [2021-12-15 21:46:33,509 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 [2021-12-15 21:46:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:46:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-15 21:46:33,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-15 21:46:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:46:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:46:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:46:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:46:33,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:46:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:46:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:46:33,570 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:46:33,572 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:46:33,703 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:46:33,707 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:46:33,707 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 21:46:33,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:46:33 BoogieIcfgContainer [2021-12-15 21:46:33,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:46:33,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:46:33,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:46:33,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:46:33,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:46:33" (1/3) ... [2021-12-15 21:46:33,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154f12f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:46:33, skipping insertion in model container [2021-12-15 21:46:33,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:33" (2/3) ... [2021-12-15 21:46:33,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154f12f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:46:33, skipping insertion in model container [2021-12-15 21:46:33,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:46:33" (3/3) ... [2021-12-15 21:46:33,732 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2021-12-15 21:46:33,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:46:33,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:46:33,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:46:33,799 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 [2021-12-15 21:46:33,799 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:46:33,813 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) [2021-12-15 21:46:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 21:46:33,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:33,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:46:33,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2021-12-15 21:46:33,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:33,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547479109] [2021-12-15 21:46:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:33,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:33,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:33,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:46:33,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:33,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547479109] [2021-12-15 21:46:33,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547479109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:46:33,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:46:33,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:46:33,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311255120] [2021-12-15 21:46:33,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:46:33,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:46:33,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:33,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:46:33,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:46:33,991 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) [2021-12-15 21:46:34,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:34,006 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2021-12-15 21:46:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:46:34,009 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 [2021-12-15 21:46:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:34,013 INFO L225 Difference]: With dead ends: 47 [2021-12-15 21:46:34,013 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 21:46:34,016 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 [2021-12-15 21:46:34,019 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 [2021-12-15 21:46:34,020 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] [2021-12-15 21:46:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 21:46:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-15 21:46:34,043 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) [2021-12-15 21:46:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-15 21:46:34,046 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2021-12-15 21:46:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:34,046 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-15 21:46:34,047 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) [2021-12-15 21:46:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-15 21:46:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 21:46:34,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:34,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:46:34,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:46:34,050 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:34,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2021-12-15 21:46:34,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:34,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999485199] [2021-12-15 21:46:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:34,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:34,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:34,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:46:34,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:34,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999485199] [2021-12-15 21:46:34,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999485199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:46:34,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:46:34,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 21:46:34,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974049018] [2021-12-15 21:46:34,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:46:34,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 21:46:34,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 21:46:34,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:46:34,187 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) [2021-12-15 21:46:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:34,226 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-15 21:46:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:46:34,227 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 [2021-12-15 21:46:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:34,228 INFO L225 Difference]: With dead ends: 39 [2021-12-15 21:46:34,228 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 21:46:34,232 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 [2021-12-15 21:46:34,234 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 [2021-12-15 21:46:34,235 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] [2021-12-15 21:46:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 21:46:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-12-15 21:46:34,245 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) [2021-12-15 21:46:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-15 21:46:34,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-12-15 21:46:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:34,247 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-15 21:46:34,251 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) [2021-12-15 21:46:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-15 21:46:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 21:46:34,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:34,253 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] [2021-12-15 21:46:34,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:46:34,253 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2021-12-15 21:46:34,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:34,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456287651] [2021-12-15 21:46:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:34,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:34,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:34,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:34,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 21:46:34,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456287651] [2021-12-15 21:46:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456287651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170338140] [2021-12-15 21:46:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:34,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:34,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:34,500 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) [2021-12-15 21:46:34,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:46:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 21:46:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:34,704 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 [2021-12-15 21:46:34,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 21:46:34,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:34,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:34,885 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 [2021-12-15 21:46:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 21:46:35,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170338140] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:35,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:35,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-15 21:46:35,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353175466] [2021-12-15 21:46:35,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:35,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:46:35,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:46:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:46:35,113 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) [2021-12-15 21:46:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:35,342 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-12-15 21:46:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 21:46:35,342 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 [2021-12-15 21:46:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:35,343 INFO L225 Difference]: With dead ends: 48 [2021-12-15 21:46:35,343 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 21:46:35,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-12-15 21:46:35,344 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 [2021-12-15 21:46:35,345 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] [2021-12-15 21:46:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 21:46:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-12-15 21:46:35,348 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) [2021-12-15 21:46:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-15 21:46:35,349 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2021-12-15 21:46:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:35,350 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-15 21:46:35,350 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) [2021-12-15 21:46:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-15 21:46:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 21:46:35,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:35,351 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] [2021-12-15 21:46:35,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:46:35,566 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 [2021-12-15 21:46:35,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:35,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2021-12-15 21:46:35,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:35,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689792446] [2021-12-15 21:46:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:35,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:35,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:35,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:35,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:35,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:35,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689792446] [2021-12-15 21:46:35,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689792446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:35,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326550481] [2021-12-15 21:46:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:35,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:35,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:35,634 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) [2021-12-15 21:46:35,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:46:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:46:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:35,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:35,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326550481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:35,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:35,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 21:46:35,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104019588] [2021-12-15 21:46:35,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:35,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:46:35,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:46:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:46:35,818 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) [2021-12-15 21:46:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:35,869 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-15 21:46:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:46:35,870 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 [2021-12-15 21:46:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:35,874 INFO L225 Difference]: With dead ends: 53 [2021-12-15 21:46:35,874 INFO L226 Difference]: Without dead ends: 41 [2021-12-15 21:46:35,874 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 [2021-12-15 21:46:35,876 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 [2021-12-15 21:46:35,877 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] [2021-12-15 21:46:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-15 21:46:35,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-12-15 21:46:35,886 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) [2021-12-15 21:46:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-15 21:46:35,895 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2021-12-15 21:46:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:35,896 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-15 21:46:35,896 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) [2021-12-15 21:46:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-15 21:46:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:46:35,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:35,897 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] [2021-12-15 21:46:35,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:46:36,107 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 [2021-12-15 21:46:36,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2021-12-15 21:46:36,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185081282] [2021-12-15 21:46:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:36,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:36,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:36,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:36,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:36,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185081282] [2021-12-15 21:46:36,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185081282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325370590] [2021-12-15 21:46:36,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:46:36,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:36,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:36,277 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) [2021-12-15 21:46:36,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:46:36,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:46:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-15 21:46:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:36,466 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 [2021-12-15 21:46:36,580 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:46:36,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:46:36,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 21:46:36,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:36,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-15 21:46:36,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-15 21:46:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:36,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325370590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:36,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:36,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-12-15 21:46:36,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756887159] [2021-12-15 21:46:36,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:36,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 21:46:36,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 21:46:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-12-15 21:46:36,925 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) [2021-12-15 21:46:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:37,090 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-12-15 21:46:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 21:46:37,091 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 [2021-12-15 21:46:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:37,092 INFO L225 Difference]: With dead ends: 55 [2021-12-15 21:46:37,092 INFO L226 Difference]: Without dead ends: 53 [2021-12-15 21:46:37,093 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 [2021-12-15 21:46:37,093 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 [2021-12-15 21:46:37,093 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] [2021-12-15 21:46:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-15 21:46:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-12-15 21:46:37,097 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) [2021-12-15 21:46:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-12-15 21:46:37,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 35 [2021-12-15 21:46:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:37,098 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-12-15 21:46:37,098 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) [2021-12-15 21:46:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-12-15 21:46:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 21:46:37,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:37,099 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] [2021-12-15 21:46:37,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 21:46:37,317 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 [2021-12-15 21:46:37,317 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2021-12-15 21:46:37,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:37,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066185579] [2021-12-15 21:46:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:37,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:37,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:37,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:37,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:37,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:37,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:37,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066185579] [2021-12-15 21:46:37,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066185579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:37,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184126386] [2021-12-15 21:46:37,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:46:37,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:37,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:37,450 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) [2021-12-15 21:46:37,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:46:37,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:46:37,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:37,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-15 21:46:37,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:37,663 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 [2021-12-15 21:46:37,860 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:46:37,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2021-12-15 21:46:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:37,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:38,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:38,090 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 [2021-12-15 21:46:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:38,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184126386] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:38,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:38,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2021-12-15 21:46:38,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868424340] [2021-12-15 21:46:38,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:38,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 21:46:38,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 21:46:38,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-12-15 21:46:38,354 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) [2021-12-15 21:46:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:38,696 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-12-15 21:46:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 21:46:38,697 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 [2021-12-15 21:46:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:38,698 INFO L225 Difference]: With dead ends: 54 [2021-12-15 21:46:38,698 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 21:46:38,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 21:46:38,699 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 [2021-12-15 21:46:38,699 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] [2021-12-15 21:46:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 21:46:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-15 21:46:38,702 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) [2021-12-15 21:46:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-15 21:46:38,702 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 39 [2021-12-15 21:46:38,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:38,703 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-15 21:46:38,703 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) [2021-12-15 21:46:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-15 21:46:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 21:46:38,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:38,703 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] [2021-12-15 21:46:38,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:46:38,904 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 [2021-12-15 21:46:38,904 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2021-12-15 21:46:38,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:38,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564240809] [2021-12-15 21:46:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:38,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:39,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:39,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:39,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:39,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 21:46:39,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:39,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564240809] [2021-12-15 21:46:39,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564240809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:39,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541100873] [2021-12-15 21:46:39,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:46:39,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:39,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:39,051 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) [2021-12-15 21:46:39,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:46:39,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 21:46:39,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:39,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 21:46:39,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:39,241 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 [2021-12-15 21:46:39,414 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:46:39,414 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 [2021-12-15 21:46:39,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:46:39,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:39,580 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 20 treesize of output 18 [2021-12-15 21:46:39,583 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 [2021-12-15 21:46:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 21:46:39,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541100873] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:39,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:39,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2021-12-15 21:46:39,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535427246] [2021-12-15 21:46:39,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:39,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 21:46:39,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:39,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 21:46:39,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-12-15 21:46:39,746 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) [2021-12-15 21:46:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:39,968 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-15 21:46:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 21:46:39,969 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 [2021-12-15 21:46:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:39,969 INFO L225 Difference]: With dead ends: 60 [2021-12-15 21:46:39,969 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 21:46:39,970 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 [2021-12-15 21:46:39,970 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 [2021-12-15 21:46:39,970 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] [2021-12-15 21:46:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 21:46:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-12-15 21:46:39,991 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) [2021-12-15 21:46:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-15 21:46:39,992 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 47 [2021-12-15 21:46:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:39,993 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-15 21:46:39,993 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) [2021-12-15 21:46:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-15 21:46:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 21:46:39,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:39,995 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] [2021-12-15 21:46:40,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:46:40,207 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 [2021-12-15 21:46:40,207 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 513051739, now seen corresponding path program 3 times [2021-12-15 21:46:40,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749006796] [2021-12-15 21:46:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:40,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:40,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:40,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:40,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:40,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:46:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:46:40,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:40,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749006796] [2021-12-15 21:46:40,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749006796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114135443] [2021-12-15 21:46:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:46:40,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:40,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:40,398 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) [2021-12-15 21:46:40,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:46:40,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 21:46:40,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 21:46:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:40,546 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 [2021-12-15 21:46:40,599 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:46:40,600 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 [2021-12-15 21:46:40,662 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:46:40,662 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 25 treesize of output 24 [2021-12-15 21:46:40,734 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:46:40,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:46:40,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 21:46:40,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:40,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:40,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-15 21:46:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 21:46:41,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114135443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:41,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:41,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 24 [2021-12-15 21:46:41,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378022198] [2021-12-15 21:46:41,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:41,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 21:46:41,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 21:46:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-12-15 21:46:41,100 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) [2021-12-15 21:46:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:41,241 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-12-15 21:46:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 21:46:41,242 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 [2021-12-15 21:46:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:41,243 INFO L225 Difference]: With dead ends: 60 [2021-12-15 21:46:41,243 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 21:46:41,243 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 [2021-12-15 21:46:41,244 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 [2021-12-15 21:46:41,244 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] [2021-12-15 21:46:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 21:46:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-12-15 21:46:41,248 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) [2021-12-15 21:46:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-12-15 21:46:41,248 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 51 [2021-12-15 21:46:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:41,248 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-12-15 21:46:41,249 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) [2021-12-15 21:46:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-12-15 21:46:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 21:46:41,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:41,249 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] [2021-12-15 21:46:41,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:46:41,468 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 [2021-12-15 21:46:41,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:41,469 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2021-12-15 21:46:41,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:41,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2632023] [2021-12-15 21:46:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:41,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:41,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:41,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:41,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:41,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:41,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 21:46:41,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:41,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2632023] [2021-12-15 21:46:41,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2632023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:41,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594800513] [2021-12-15 21:46:41,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:46:41,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:41,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:41,679 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) [2021-12-15 21:46:41,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:46:41,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:46:41,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:41,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 21:46:41,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:41,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 21:46:41,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 21:46:41,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:42,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:42,081 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 [2021-12-15 21:46:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 21:46:42,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594800513] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:42,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:42,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2021-12-15 21:46:42,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473140894] [2021-12-15 21:46:42,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:42,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 21:46:42,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:42,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 21:46:42,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 21:46:42,305 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) [2021-12-15 21:46:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:42,947 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-12-15 21:46:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 21:46:42,948 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 [2021-12-15 21:46:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:42,948 INFO L225 Difference]: With dead ends: 86 [2021-12-15 21:46:42,948 INFO L226 Difference]: Without dead ends: 84 [2021-12-15 21:46:42,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=2456, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 21:46:42,950 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 [2021-12-15 21:46:42,950 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] [2021-12-15 21:46:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-15 21:46:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-12-15 21:46:42,966 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) [2021-12-15 21:46:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-15 21:46:42,966 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 51 [2021-12-15 21:46:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:42,967 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-15 21:46:42,967 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) [2021-12-15 21:46:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-15 21:46:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 21:46:42,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:42,968 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] [2021-12-15 21:46:43,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 21:46:43,183 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 [2021-12-15 21:46:43,183 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2001937361, now seen corresponding path program 5 times [2021-12-15 21:46:43,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001401503] [2021-12-15 21:46:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:43,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:43,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:43,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:43,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:43,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:43,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:46:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:46:43,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:43,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001401503] [2021-12-15 21:46:43,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001401503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:43,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969240019] [2021-12-15 21:46:43,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:46:43,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:43,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:43,372 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) [2021-12-15 21:46:43,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:46:43,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-15 21:46:43,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:43,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-15 21:46:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:43,521 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 [2021-12-15 21:46:45,684 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:46:45,684 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 [2021-12-15 21:46:47,850 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:46:47,850 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 [2021-12-15 21:46:47,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 21:46:47,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969240019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:48,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:46:48,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-12-15 21:46:48,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273814881] [2021-12-15 21:46:48,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:48,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 21:46:48,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 21:46:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=421, Unknown=1, NotChecked=0, Total=506 [2021-12-15 21:46:48,013 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 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) [2021-12-15 21:46:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:48,229 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-12-15 21:46:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 21:46:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 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 55 [2021-12-15 21:46:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:48,230 INFO L225 Difference]: With dead ends: 68 [2021-12-15 21:46:48,230 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 21:46:48,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=160, Invalid=895, Unknown=1, NotChecked=0, Total=1056 [2021-12-15 21:46:48,231 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:46:48,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 201 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 261 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2021-12-15 21:46:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 21:46:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-12-15 21:46:48,235 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) [2021-12-15 21:46:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-15 21:46:48,236 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 55 [2021-12-15 21:46:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:48,236 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-15 21:46:48,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 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) [2021-12-15 21:46:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-15 21:46:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 21:46:48,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:48,237 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] [2021-12-15 21:46:48,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:46:48,445 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 [2021-12-15 21:46:48,445 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1453174918, now seen corresponding path program 6 times [2021-12-15 21:46:48,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:48,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788876862] [2021-12-15 21:46:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:48,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:48,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:48,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:48,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:48,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:48,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 21:46:48,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:48,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788876862] [2021-12-15 21:46:48,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788876862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:48,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525055191] [2021-12-15 21:46:48,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:46:48,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:48,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:48,549 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) [2021-12-15 21:46:48,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:46:48,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 21:46:48,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:48,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 21:46:48,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 21:46:48,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 21:46:48,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525055191] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:48,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:48,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 21:46:48,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935698525] [2021-12-15 21:46:48,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:48,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:46:48,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:48,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:46:48,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:46:48,811 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) [2021-12-15 21:46:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:48,915 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-12-15 21:46:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 21:46:48,915 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 [2021-12-15 21:46:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:48,916 INFO L225 Difference]: With dead ends: 89 [2021-12-15 21:46:48,916 INFO L226 Difference]: Without dead ends: 69 [2021-12-15 21:46:48,916 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 [2021-12-15 21:46:48,917 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:46:48,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 154 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:46:48,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-15 21:46:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-12-15 21:46:48,921 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) [2021-12-15 21:46:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-12-15 21:46:48,922 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 55 [2021-12-15 21:46:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:48,922 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-12-15 21:46:48,922 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) [2021-12-15 21:46:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-12-15 21:46:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 21:46:48,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:48,923 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] [2021-12-15 21:46:48,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:46:49,145 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 [2021-12-15 21:46:49,145 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 7 times [2021-12-15 21:46:49,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:49,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151777425] [2021-12-15 21:46:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:49,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:49,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:49,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:49,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:49,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:49,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:46:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:46:49,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:49,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151777425] [2021-12-15 21:46:49,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151777425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:49,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943372616] [2021-12-15 21:46:49,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:46:49,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:49,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:49,405 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) [2021-12-15 21:46:49,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 21:46:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 21:46:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:49,635 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 [2021-12-15 21:46:49,729 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:46:49,730 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 [2021-12-15 21:46:49,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 21:46:49,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:49,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943372616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:49,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:46:49,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-12-15 21:46:49,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757331055] [2021-12-15 21:46:49,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:49,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 21:46:49,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:49,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 21:46:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:46:49,985 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) [2021-12-15 21:46:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:50,451 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-12-15 21:46:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 21:46:50,452 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 [2021-12-15 21:46:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:50,452 INFO L225 Difference]: With dead ends: 62 [2021-12-15 21:46:50,452 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 21:46:50,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=2155, Unknown=0, NotChecked=0, Total=2450 [2021-12-15 21:46:50,453 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:46:50,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 247 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 415 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2021-12-15 21:46:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 21:46:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-15 21:46:50,458 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) [2021-12-15 21:46:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-12-15 21:46:50,459 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 59 [2021-12-15 21:46:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:50,459 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-12-15 21:46:50,459 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) [2021-12-15 21:46:50,459 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-12-15 21:46:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 21:46:50,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:50,460 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] [2021-12-15 21:46:50,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-15 21:46:50,676 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 [2021-12-15 21:46:50,677 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:50,677 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 8 times [2021-12-15 21:46:50,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:50,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289456365] [2021-12-15 21:46:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:50,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:50,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:50,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:50,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:50,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:50,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:50,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:46:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:46:50,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:50,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289456365] [2021-12-15 21:46:50,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289456365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:50,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435569118] [2021-12-15 21:46:50,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:46:50,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:50,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:50,895 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) [2021-12-15 21:46:50,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 21:46:50,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:46:50,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 21:46:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:51,167 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 [2021-12-15 21:46:51,468 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:46:51,468 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 [2021-12-15 21:46:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:46:51,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:51,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-12-15 21:46:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:46:52,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435569118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:52,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:52,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2021-12-15 21:46:52,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161411519] [2021-12-15 21:46:52,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:52,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-15 21:46:52,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-15 21:46:52,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 21:46:52,230 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) [2021-12-15 21:46:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:52,926 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-12-15 21:46:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 21:46:52,927 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 [2021-12-15 21:46:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:52,928 INFO L225 Difference]: With dead ends: 80 [2021-12-15 21:46:52,928 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 21:46:52,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=552, Invalid=4004, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 21:46:52,929 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:46:52,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 344 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 274 Invalid, 0 Unknown, 158 Unchecked, 0.1s Time] [2021-12-15 21:46:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 21:46:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-15 21:46:52,934 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) [2021-12-15 21:46:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-15 21:46:52,934 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 63 [2021-12-15 21:46:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:52,934 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-15 21:46:52,935 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) [2021-12-15 21:46:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-15 21:46:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 21:46:52,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:52,935 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] [2021-12-15 21:46:52,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 21:46:53,139 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 [2021-12-15 21:46:53,140 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:53,140 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 9 times [2021-12-15 21:46:53,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:53,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778854158] [2021-12-15 21:46:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:53,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:53,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:53,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:53,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:53,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:46:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:46:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-15 21:46:53,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:53,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778854158] [2021-12-15 21:46:53,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778854158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:53,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51407506] [2021-12-15 21:46:53,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:46:53,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:53,391 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) [2021-12-15 21:46:53,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 21:46:53,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 21:46:53,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-15 21:46:53,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:53,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:46:53,838 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:46:53,838 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 [2021-12-15 21:46:53,945 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 [2021-12-15 21:46:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:46:53,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:54,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:54,118 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 [2021-12-15 21:46:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-15 21:46:54,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51407506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:54,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:54,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2021-12-15 21:46:54,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019515900] [2021-12-15 21:46:54,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:54,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 21:46:54,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 21:46:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 21:46:54,371 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) [2021-12-15 21:46:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:54,658 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-12-15 21:46:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-15 21:46:54,658 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 [2021-12-15 21:46:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:54,659 INFO L225 Difference]: With dead ends: 88 [2021-12-15 21:46:54,659 INFO L226 Difference]: Without dead ends: 86 [2021-12-15 21:46:54,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 21:46:54,661 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 [2021-12-15 21:46:54,661 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] [2021-12-15 21:46:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-15 21:46:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2021-12-15 21:46:54,665 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) [2021-12-15 21:46:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-12-15 21:46:54,665 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 71 [2021-12-15 21:46:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:54,666 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-12-15 21:46:54,666 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) [2021-12-15 21:46:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-12-15 21:46:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 21:46:54,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:54,666 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] [2021-12-15 21:46:54,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-15 21:46:54,871 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 [2021-12-15 21:46:54,871 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1947082230, now seen corresponding path program 10 times [2021-12-15 21:46:54,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:54,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718809383] [2021-12-15 21:46:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:54,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:55,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:55,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:55,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:55,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:46:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:55,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:46:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-15 21:46:55,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:55,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718809383] [2021-12-15 21:46:55,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718809383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:55,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777480189] [2021-12-15 21:46:55,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:46:55,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:55,133 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) [2021-12-15 21:46:55,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 21:46:55,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:46:55,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:55,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-15 21:46:55,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:55,418 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 [2021-12-15 21:46:55,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-15 21:46:55,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:46:55,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:46:55,646 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 [2021-12-15 21:46:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-15 21:46:55,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777480189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:46:55,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:46:55,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 33 [2021-12-15 21:46:55,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496218792] [2021-12-15 21:46:55,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:46:55,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 21:46:55,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:46:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 21:46:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:46:55,954 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) [2021-12-15 21:46:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:46:56,690 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-12-15 21:46:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-15 21:46:56,690 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 [2021-12-15 21:46:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:46:56,691 INFO L225 Difference]: With dead ends: 114 [2021-12-15 21:46:56,691 INFO L226 Difference]: Without dead ends: 112 [2021-12-15 21:46:56,692 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 [2021-12-15 21:46:56,692 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:46:56,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 493 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 21:46:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-15 21:46:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2021-12-15 21:46:56,697 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) [2021-12-15 21:46:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-12-15 21:46:56,697 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 75 [2021-12-15 21:46:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:46:56,698 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-12-15 21:46:56,698 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) [2021-12-15 21:46:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-12-15 21:46:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 21:46:56,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:46:56,698 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] [2021-12-15 21:46:56,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-15 21:46:56,911 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 [2021-12-15 21:46:56,911 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:46:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:46:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1497562435, now seen corresponding path program 11 times [2021-12-15 21:46:56,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:46:56,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549142664] [2021-12-15 21:46:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:46:56,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:46:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:46:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:46:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:46:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:46:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:46:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:46:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:46:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:46:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:46:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-15 21:46:57,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:46:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549142664] [2021-12-15 21:46:57,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549142664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:46:57,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418512577] [2021-12-15 21:46:57,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:46:57,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:46:57,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:46:57,210 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) [2021-12-15 21:46:57,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 21:46:57,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-15 21:46:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:46:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-15 21:46:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:46:57,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:46:59,610 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:46:59,610 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 [2021-12-15 21:47:01,771 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:47:01,771 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 [2021-12-15 21:47:01,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-12-15 21:47:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 54 proven. 102 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 21:47:01,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:01,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418512577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:01,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:47:01,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-12-15 21:47:01,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739643452] [2021-12-15 21:47:01,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:01,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 21:47:01,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:01,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 21:47:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=705, Unknown=1, NotChecked=0, Total=812 [2021-12-15 21:47:01,990 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) [2021-12-15 21:47:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:02,329 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-12-15 21:47:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-15 21:47:02,330 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 [2021-12-15 21:47:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:02,330 INFO L225 Difference]: With dead ends: 100 [2021-12-15 21:47:02,330 INFO L226 Difference]: Without dead ends: 98 [2021-12-15 21:47:02,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=182, Invalid=1299, Unknown=1, NotChecked=0, Total=1482 [2021-12-15 21:47:02,331 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 [2021-12-15 21:47:02,331 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] [2021-12-15 21:47:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-15 21:47:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2021-12-15 21:47:02,336 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) [2021-12-15 21:47:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-12-15 21:47:02,337 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 79 [2021-12-15 21:47:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:02,337 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-12-15 21:47:02,337 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) [2021-12-15 21:47:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-12-15 21:47:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 21:47:02,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:02,338 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] [2021-12-15 21:47:02,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:02,538 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 [2021-12-15 21:47:02,538 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1814327276, now seen corresponding path program 12 times [2021-12-15 21:47:02,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:02,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841493078] [2021-12-15 21:47:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:02,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:02,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:02,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:02,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:02,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:02,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:02,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 21:47:02,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841493078] [2021-12-15 21:47:02,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841493078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:02,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974989654] [2021-12-15 21:47:02,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:47:02,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:02,643 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) [2021-12-15 21:47:02,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 21:47:02,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-15 21:47:02,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:02,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 21:47:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 21:47:02,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 21:47:03,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974989654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:03,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:03,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-15 21:47:03,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975492463] [2021-12-15 21:47:03,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:03,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 21:47:03,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 21:47:03,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-15 21:47:03,084 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) [2021-12-15 21:47:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:03,202 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-12-15 21:47:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 21:47:03,202 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 [2021-12-15 21:47:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:03,203 INFO L225 Difference]: With dead ends: 121 [2021-12-15 21:47:03,203 INFO L226 Difference]: Without dead ends: 93 [2021-12-15 21:47:03,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-15 21:47:03,204 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 [2021-12-15 21:47:03,204 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] [2021-12-15 21:47:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-15 21:47:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-12-15 21:47:03,209 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) [2021-12-15 21:47:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-12-15 21:47:03,209 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 79 [2021-12-15 21:47:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:03,209 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-12-15 21:47:03,210 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) [2021-12-15 21:47:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-12-15 21:47:03,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 21:47:03,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:03,210 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] [2021-12-15 21:47:03,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:03,418 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 [2021-12-15 21:47:03,418 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash -502341447, now seen corresponding path program 13 times [2021-12-15 21:47:03,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:03,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781835721] [2021-12-15 21:47:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:03,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-15 21:47:03,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:03,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781835721] [2021-12-15 21:47:03,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781835721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:03,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368806373] [2021-12-15 21:47:03,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:47:03,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:03,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:03,638 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) [2021-12-15 21:47:03,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 21:47:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-15 21:47:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:03,967 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 [2021-12-15 21:47:06,147 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:47:06,147 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 [2021-12-15 21:47:06,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 40 proven. 116 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-15 21:47:06,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:06,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-15 21:47:06,453 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 [2021-12-15 21:47:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-15 21:47:06,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368806373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:06,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:06,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2021-12-15 21:47:06,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198151206] [2021-12-15 21:47:06,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:06,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-15 21:47:06,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-15 21:47:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1132, Unknown=1, NotChecked=0, Total=1260 [2021-12-15 21:47:06,693 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) [2021-12-15 21:47:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:07,115 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2021-12-15 21:47:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-15 21:47:07,115 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 [2021-12-15 21:47:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:07,116 INFO L225 Difference]: With dead ends: 114 [2021-12-15 21:47:07,116 INFO L226 Difference]: Without dead ends: 112 [2021-12-15 21:47:07,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 157 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=243, Invalid=2206, Unknown=1, NotChecked=0, Total=2450 [2021-12-15 21:47:07,117 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 [2021-12-15 21:47:07,117 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] [2021-12-15 21:47:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-15 21:47:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 89. [2021-12-15 21:47:07,123 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) [2021-12-15 21:47:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-15 21:47:07,124 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 83 [2021-12-15 21:47:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:07,124 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-15 21:47:07,124 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) [2021-12-15 21:47:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-15 21:47:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-15 21:47:07,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:07,125 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] [2021-12-15 21:47:07,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:07,342 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 [2021-12-15 21:47:07,342 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:07,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1833952977, now seen corresponding path program 14 times [2021-12-15 21:47:07,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:07,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566187868] [2021-12-15 21:47:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:07,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-15 21:47:07,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566187868] [2021-12-15 21:47:07,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566187868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873207925] [2021-12-15 21:47:07,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:47:07,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:07,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:07,594 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) [2021-12-15 21:47:07,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 21:47:07,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:47:07,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 21:47:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:07,982 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 [2021-12-15 21:47:08,433 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:47:08,435 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 [2021-12-15 21:47:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 66 proven. 86 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-15 21:47:08,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:08,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:08,906 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 [2021-12-15 21:47:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 61 proven. 91 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-15 21:47:09,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873207925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:09,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:09,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 56 [2021-12-15 21:47:09,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170887086] [2021-12-15 21:47:09,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:09,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-15 21:47:09,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-15 21:47:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2736, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 21:47:09,401 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) [2021-12-15 21:47:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:10,478 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-12-15 21:47:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-15 21:47:10,479 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 [2021-12-15 21:47:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:10,480 INFO L225 Difference]: With dead ends: 112 [2021-12-15 21:47:10,480 INFO L226 Difference]: Without dead ends: 84 [2021-12-15 21:47:10,483 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 [2021-12-15 21:47:10,484 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 [2021-12-15 21:47:10,484 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] [2021-12-15 21:47:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-15 21:47:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-15 21:47:10,491 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) [2021-12-15 21:47:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-12-15 21:47:10,492 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 87 [2021-12-15 21:47:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:10,492 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-12-15 21:47:10,493 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) [2021-12-15 21:47:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-12-15 21:47:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 21:47:10,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:10,496 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] [2021-12-15 21:47:10,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:10,712 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 [2021-12-15 21:47:10,713 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash 474886268, now seen corresponding path program 15 times [2021-12-15 21:47:10,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:10,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117845409] [2021-12-15 21:47:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:10,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:10,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:10,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:10,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:11,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:11,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:11,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 147 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 21:47:11,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117845409] [2021-12-15 21:47:11,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117845409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:11,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988450848] [2021-12-15 21:47:11,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:47:11,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:11,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:11,013 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) [2021-12-15 21:47:11,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 21:47:11,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-15 21:47:11,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 21:47:11,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:11,346 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 [2021-12-15 21:47:11,576 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:47:11,576 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 27 treesize of output 26 [2021-12-15 21:47:13,716 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:47:13,716 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 [2021-12-15 21:47:13,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 65 proven. 144 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-15 21:47:13,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:13,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988450848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:13,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:47:13,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-12-15 21:47:13,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946026773] [2021-12-15 21:47:13,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:13,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 21:47:13,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 21:47:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-12-15 21:47:13,965 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) [2021-12-15 21:47:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:14,385 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-12-15 21:47:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 21:47:14,386 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 [2021-12-15 21:47:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:14,386 INFO L225 Difference]: With dead ends: 93 [2021-12-15 21:47:14,386 INFO L226 Difference]: Without dead ends: 91 [2021-12-15 21:47:14,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 113 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 21:47:14,387 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 [2021-12-15 21:47:14,388 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] [2021-12-15 21:47:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-15 21:47:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-15 21:47:14,393 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) [2021-12-15 21:47:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-12-15 21:47:14,393 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 91 [2021-12-15 21:47:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:14,394 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-12-15 21:47:14,394 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) [2021-12-15 21:47:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-12-15 21:47:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 21:47:14,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:14,394 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] [2021-12-15 21:47:14,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:14,595 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 [2021-12-15 21:47:14,595 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash -110375054, now seen corresponding path program 16 times [2021-12-15 21:47:14,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:14,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883612451] [2021-12-15 21:47:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:14,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 21:47:14,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:14,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883612451] [2021-12-15 21:47:14,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883612451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:14,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272991384] [2021-12-15 21:47:14,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:47:14,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:14,891 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) [2021-12-15 21:47:14,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 21:47:14,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:47:14,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:14,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-15 21:47:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:15,216 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 [2021-12-15 21:47:15,380 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:47:15,380 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 [2021-12-15 21:47:15,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-15 21:47:15,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:15,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272991384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:15,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:47:15,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2021-12-15 21:47:15,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821173743] [2021-12-15 21:47:15,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:15,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 21:47:15,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:15,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 21:47:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:47:15,676 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) [2021-12-15 21:47:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:16,153 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-12-15 21:47:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-15 21:47:16,153 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 [2021-12-15 21:47:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:16,160 INFO L225 Difference]: With dead ends: 124 [2021-12-15 21:47:16,163 INFO L226 Difference]: Without dead ends: 122 [2021-12-15 21:47:16,163 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 [2021-12-15 21:47:16,164 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 [2021-12-15 21:47:16,164 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] [2021-12-15 21:47:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-15 21:47:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2021-12-15 21:47:16,172 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) [2021-12-15 21:47:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-12-15 21:47:16,173 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 95 [2021-12-15 21:47:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:16,174 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-12-15 21:47:16,174 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) [2021-12-15 21:47:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-12-15 21:47:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 21:47:16,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:16,175 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] [2021-12-15 21:47:16,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:16,380 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 [2021-12-15 21:47:16,380 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:16,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1072364696, now seen corresponding path program 17 times [2021-12-15 21:47:16,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:16,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317804621] [2021-12-15 21:47:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:16,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 21:47:16,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:16,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317804621] [2021-12-15 21:47:16,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317804621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:16,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519957818] [2021-12-15 21:47:16,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:47:16,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:16,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:16,671 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) [2021-12-15 21:47:16,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 21:47:16,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-15 21:47:16,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:16,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-15 21:47:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:17,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 21:47:17,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 21:47:17,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:17,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:17,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-15 21:47:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 21:47:17,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519957818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:17,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:17,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 42 [2021-12-15 21:47:17,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265758596] [2021-12-15 21:47:17,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:17,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 21:47:17,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 21:47:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 21:47:17,764 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) [2021-12-15 21:47:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:18,721 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2021-12-15 21:47:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-15 21:47:18,721 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 [2021-12-15 21:47:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:18,722 INFO L225 Difference]: With dead ends: 150 [2021-12-15 21:47:18,722 INFO L226 Difference]: Without dead ends: 148 [2021-12-15 21:47:18,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 189 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=424, Invalid=4268, Unknown=0, NotChecked=0, Total=4692 [2021-12-15 21:47:18,724 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 156 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:47:18,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 879 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 21:47:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-15 21:47:18,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2021-12-15 21:47:18,730 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) [2021-12-15 21:47:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-12-15 21:47:18,731 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2021-12-15 21:47:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:18,731 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-12-15 21:47:18,731 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) [2021-12-15 21:47:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-12-15 21:47:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-15 21:47:18,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:18,732 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] [2021-12-15 21:47:18,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:18,947 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 [2021-12-15 21:47:18,947 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:18,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:18,948 INFO L85 PathProgramCache]: Analyzing trace with hash -369454411, now seen corresponding path program 18 times [2021-12-15 21:47:18,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:18,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866239427] [2021-12-15 21:47:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:18,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-15 21:47:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 197 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 21:47:19,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866239427] [2021-12-15 21:47:19,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866239427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886781658] [2021-12-15 21:47:19,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:47:19,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:19,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:19,245 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) [2021-12-15 21:47:19,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 21:47:19,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-15 21:47:19,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-15 21:47:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:19,677 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 [2021-12-15 21:47:19,764 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:47:19,765 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 [2021-12-15 21:47:19,856 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:47:19,856 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 [2021-12-15 21:47:20,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 76 proven. 194 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-15 21:47:20,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:20,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:20,236 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 [2021-12-15 21:47:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-15 21:47:20,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886781658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:20,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:20,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 43 [2021-12-15 21:47:20,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378049978] [2021-12-15 21:47:20,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:20,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-15 21:47:20,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-15 21:47:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 21:47:20,532 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) [2021-12-15 21:47:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:21,213 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2021-12-15 21:47:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 21:47:21,214 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 [2021-12-15 21:47:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:21,215 INFO L225 Difference]: With dead ends: 137 [2021-12-15 21:47:21,215 INFO L226 Difference]: Without dead ends: 135 [2021-12-15 21:47:21,215 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 [2021-12-15 21:47:21,216 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 [2021-12-15 21:47:21,216 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] [2021-12-15 21:47:21,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-15 21:47:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-12-15 21:47:21,223 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) [2021-12-15 21:47:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-12-15 21:47:21,223 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 103 [2021-12-15 21:47:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:21,224 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-12-15 21:47:21,224 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) [2021-12-15 21:47:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-12-15 21:47:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-15 21:47:21,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:21,225 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] [2021-12-15 21:47:21,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:21,441 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 [2021-12-15 21:47:21,442 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:21,442 INFO L85 PathProgramCache]: Analyzing trace with hash -428389282, now seen corresponding path program 19 times [2021-12-15 21:47:21,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:21,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299648248] [2021-12-15 21:47:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:21,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-15 21:47:21,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:21,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299648248] [2021-12-15 21:47:21,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299648248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:21,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505711942] [2021-12-15 21:47:21,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:47:21,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:21,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:21,573 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) [2021-12-15 21:47:21,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 21:47:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 21:47:21,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-15 21:47:21,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-15 21:47:22,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505711942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:22,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:22,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-15 21:47:22,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966492583] [2021-12-15 21:47:22,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:22,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 21:47:22,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 21:47:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-12-15 21:47:22,081 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) [2021-12-15 21:47:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:22,256 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-12-15 21:47:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 21:47:22,257 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 [2021-12-15 21:47:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:22,257 INFO L225 Difference]: With dead ends: 153 [2021-12-15 21:47:22,258 INFO L226 Difference]: Without dead ends: 117 [2021-12-15 21:47:22,258 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 [2021-12-15 21:47:22,258 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 [2021-12-15 21:47:22,258 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] [2021-12-15 21:47:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-15 21:47:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2021-12-15 21:47:22,265 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) [2021-12-15 21:47:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-12-15 21:47:22,265 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 103 [2021-12-15 21:47:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:22,266 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-12-15 21:47:22,266 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) [2021-12-15 21:47:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-12-15 21:47:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 21:47:22,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:22,266 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] [2021-12-15 21:47:22,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:22,483 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 [2021-12-15 21:47:22,483 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:22,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2033872171, now seen corresponding path program 20 times [2021-12-15 21:47:22,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:22,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540650642] [2021-12-15 21:47:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:22,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-15 21:47:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 21:47:22,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540650642] [2021-12-15 21:47:22,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540650642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390833895] [2021-12-15 21:47:22,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:47:22,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:22,775 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) [2021-12-15 21:47:22,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 21:47:22,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:47:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-15 21:47:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:23,234 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 [2021-12-15 21:47:25,395 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:47:25,395 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 [2021-12-15 21:47:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 54 proven. 216 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 21:47:25,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:25,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-15 21:47:25,800 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 [2021-12-15 21:47:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 21:47:26,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390833895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:26,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:26,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 44 [2021-12-15 21:47:26,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716827958] [2021-12-15 21:47:26,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:26,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-15 21:47:26,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-15 21:47:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1732, Unknown=1, NotChecked=0, Total=1892 [2021-12-15 21:47:26,089 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) [2021-12-15 21:47:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:26,561 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2021-12-15 21:47:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 21:47:26,561 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 [2021-12-15 21:47:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:26,562 INFO L225 Difference]: With dead ends: 140 [2021-12-15 21:47:26,562 INFO L226 Difference]: Without dead ends: 138 [2021-12-15 21:47:26,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 207 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=260, Invalid=2931, Unknown=1, NotChecked=0, Total=3192 [2021-12-15 21:47:26,563 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 72 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-15 21:47:26,563 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] [2021-12-15 21:47:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-15 21:47:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2021-12-15 21:47:26,571 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) [2021-12-15 21:47:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2021-12-15 21:47:26,571 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 107 [2021-12-15 21:47:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:26,572 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2021-12-15 21:47:26,572 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) [2021-12-15 21:47:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2021-12-15 21:47:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 21:47:26,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:26,573 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] [2021-12-15 21:47:26,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-15 21:47:26,791 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 [2021-12-15 21:47:26,791 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:26,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:26,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1467751585, now seen corresponding path program 21 times [2021-12-15 21:47:26,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:26,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216349345] [2021-12-15 21:47:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:26,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-15 21:47:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 21:47:27,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:27,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216349345] [2021-12-15 21:47:27,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216349345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:27,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081002584] [2021-12-15 21:47:27,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:47:27,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:27,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:27,131 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) [2021-12-15 21:47:27,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 21:47:27,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-15 21:47:27,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 21:47:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:27,577 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 [2021-12-15 21:47:28,125 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-15 21:47:28,125 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 [2021-12-15 21:47:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 21:47:28,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:28,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:28,521 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 [2021-12-15 21:47:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 21:47:29,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081002584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:29,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:29,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 59 [2021-12-15 21:47:29,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46824663] [2021-12-15 21:47:29,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:29,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-15 21:47:29,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-15 21:47:29,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=2997, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 21:47:29,095 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) [2021-12-15 21:47:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:29,981 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2021-12-15 21:47:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-15 21:47:29,982 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 [2021-12-15 21:47:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:29,983 INFO L225 Difference]: With dead ends: 171 [2021-12-15 21:47:29,983 INFO L226 Difference]: Without dead ends: 169 [2021-12-15 21:47:29,983 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 [2021-12-15 21:47:29,984 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 [2021-12-15 21:47:29,985 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] [2021-12-15 21:47:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-15 21:47:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2021-12-15 21:47:29,996 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) [2021-12-15 21:47:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2021-12-15 21:47:29,996 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 111 [2021-12-15 21:47:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:29,997 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2021-12-15 21:47:29,997 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) [2021-12-15 21:47:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2021-12-15 21:47:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-15 21:47:29,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:29,997 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] [2021-12-15 21:47:30,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:30,214 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 [2021-12-15 21:47:30,215 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1057448942, now seen corresponding path program 22 times [2021-12-15 21:47:30,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:30,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871347427] [2021-12-15 21:47:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:30,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-15 21:47:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-15 21:47:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 255 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-15 21:47:30,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:30,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871347427] [2021-12-15 21:47:30,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871347427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:30,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088516513] [2021-12-15 21:47:30,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:47:30,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:30,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:30,563 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) [2021-12-15 21:47:30,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 21:47:30,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:47:30,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-15 21:47:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:31,073 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 [2021-12-15 21:47:31,162 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:47:31,163 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 [2021-12-15 21:47:31,258 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:47:31,258 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 [2021-12-15 21:47:31,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 87 proven. 252 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 21:47:31,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:31,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:31,697 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 [2021-12-15 21:47:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 254 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-15 21:47:32,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088516513] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:32,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:32,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 47 [2021-12-15 21:47:32,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66895937] [2021-12-15 21:47:32,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:32,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-15 21:47:32,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-15 21:47:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 21:47:32,010 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) [2021-12-15 21:47:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:32,811 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2021-12-15 21:47:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-15 21:47:32,812 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 [2021-12-15 21:47:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:32,813 INFO L225 Difference]: With dead ends: 181 [2021-12-15 21:47:32,813 INFO L226 Difference]: Without dead ends: 179 [2021-12-15 21:47:32,813 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 [2021-12-15 21:47:32,813 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 [2021-12-15 21:47:32,814 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] [2021-12-15 21:47:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-15 21:47:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 145. [2021-12-15 21:47:32,829 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) [2021-12-15 21:47:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2021-12-15 21:47:32,830 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 115 [2021-12-15 21:47:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:32,830 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2021-12-15 21:47:32,830 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) [2021-12-15 21:47:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2021-12-15 21:47:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-15 21:47:32,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:32,831 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] [2021-12-15 21:47:32,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:33,040 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 [2021-12-15 21:47:33,040 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:33,041 INFO L85 PathProgramCache]: Analyzing trace with hash -325453340, now seen corresponding path program 23 times [2021-12-15 21:47:33,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:33,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797451755] [2021-12-15 21:47:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:33,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-15 21:47:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-15 21:47:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-15 21:47:33,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:33,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797451755] [2021-12-15 21:47:33,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797451755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:33,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585176486] [2021-12-15 21:47:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:47:33,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:33,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:33,406 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) [2021-12-15 21:47:33,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 21:47:33,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-15 21:47:33,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 21:47:33,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:33,959 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 [2021-12-15 21:47:36,129 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:47:36,130 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 [2021-12-15 21:47:36,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 278 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 21:47:36,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:36,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2021-12-15 21:47:36,570 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 [2021-12-15 21:47:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-15 21:47:36,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585176486] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:36,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:36,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 50 [2021-12-15 21:47:36,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386311982] [2021-12-15 21:47:36,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:36,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-15 21:47:36,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:36,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-15 21:47:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2265, Unknown=1, NotChecked=0, Total=2450 [2021-12-15 21:47:36,933 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) [2021-12-15 21:47:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:37,750 INFO L93 Difference]: Finished difference Result 221 states and 226 transitions. [2021-12-15 21:47:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-15 21:47:37,750 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 [2021-12-15 21:47:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:37,751 INFO L225 Difference]: With dead ends: 221 [2021-12-15 21:47:37,751 INFO L226 Difference]: Without dead ends: 219 [2021-12-15 21:47:37,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 230 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=328, Invalid=4093, Unknown=1, NotChecked=0, Total=4422 [2021-12-15 21:47:37,752 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 [2021-12-15 21:47:37,752 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] [2021-12-15 21:47:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-15 21:47:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 154. [2021-12-15 21:47:37,764 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) [2021-12-15 21:47:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2021-12-15 21:47:37,764 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 119 [2021-12-15 21:47:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:37,764 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2021-12-15 21:47:37,764 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) [2021-12-15 21:47:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2021-12-15 21:47:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-15 21:47:37,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:37,765 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] [2021-12-15 21:47:37,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:37,979 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 [2021-12-15 21:47:37,979 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1033591590, now seen corresponding path program 24 times [2021-12-15 21:47:37,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:37,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957195930] [2021-12-15 21:47:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:37,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 21:47:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-15 21:47:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:47:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:47:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:47:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:47:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:47:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-15 21:47:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-15 21:47:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-15 21:47:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-15 21:47:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-15 21:47:38,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:38,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957195930] [2021-12-15 21:47:38,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957195930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:38,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43286059] [2021-12-15 21:47:38,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:47:38,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:38,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:38,354 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) [2021-12-15 21:47:38,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-15 21:47:38,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-15 21:47:38,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:38,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-15 21:47:38,562 INFO L286 TraceCheckSpWp]: Computing forward predicates...