./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/down.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/loop-invgen/down.i -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 d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:49:53,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:49:53,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:49:53,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:49:53,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:49:53,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:49:53,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:49:53,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:49:53,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:49:53,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:49:53,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:49:53,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:49:53,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:49:53,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:49:53,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:49:53,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:49:53,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:49:53,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:49:53,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:49:53,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:49:53,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:49:53,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:49:53,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:49:53,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:49:53,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:49:53,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:49:53,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:49:53,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:49:53,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:49:53,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:49:53,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:49:53,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:49:53,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:49:53,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:49:53,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:49:53,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:49:53,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:49:53,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:49:53,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:49:53,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:49:53,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:49:53,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:49:53,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:49:53,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:49:53,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:49:53,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:49:53,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:49:53,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:49:53,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:49:53,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:49:53,773 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:49:53,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:49:53,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:49:53,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:49:53,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:49:53,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:49:53,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:49:53,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:49:53,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:49:53,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:49:53,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:49:53,775 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:49:53,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:49:53,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:49:53,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:49:53,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:49:53,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:49:53,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:49:53,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:49:53,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:49:53,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:49:53,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:49:53,777 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:49:53,777 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:49:53,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:49:53,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:49:53,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 [2021-12-14 13:49:53,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:49:53,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:49:53,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:49:53,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:49:54,003 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:49:54,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/down.i [2021-12-14 13:49:54,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e736bfbc/1c9f12782cbd4f118cfedafeab575fa3/FLAG4425b9ea2 [2021-12-14 13:49:54,381 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:49:54,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/down.i [2021-12-14 13:49:54,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e736bfbc/1c9f12782cbd4f118cfedafeab575fa3/FLAG4425b9ea2 [2021-12-14 13:49:54,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e736bfbc/1c9f12782cbd4f118cfedafeab575fa3 [2021-12-14 13:49:54,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:49:54,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:49:54,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:49:54,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:49:54,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:49:54,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5479fd0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54, skipping insertion in model container [2021-12-14 13:49:54,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:49:54,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:49:54,563 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/loop-invgen/down.i[893,906] [2021-12-14 13:49:54,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:49:54,580 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:49:54,589 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/loop-invgen/down.i[893,906] [2021-12-14 13:49:54,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:49:54,601 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:49:54,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54 WrapperNode [2021-12-14 13:49:54,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:49:54,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:49:54,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:49:54,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:49:54,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,622 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2021-12-14 13:49:54,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:49:54,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:49:54,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:49:54,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:49:54,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:49:54,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:49:54,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:49:54,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:49:54,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (1/1) ... [2021-12-14 13:49:54,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:49:54,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:54,663 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) [2021-12-14 13:49:54,699 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 [2021-12-14 13:49:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:49:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:49:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:49:54,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:49:54,744 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:49:54,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:49:54,819 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:49:54,822 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:49:54,822 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 13:49:54,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:49:54 BoogieIcfgContainer [2021-12-14 13:49:54,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:49:54,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:49:54,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:49:54,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:49:54,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:49:54" (1/3) ... [2021-12-14 13:49:54,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f3e9a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:49:54, skipping insertion in model container [2021-12-14 13:49:54,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:54" (2/3) ... [2021-12-14 13:49:54,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f3e9a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:49:54, skipping insertion in model container [2021-12-14 13:49:54,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:49:54" (3/3) ... [2021-12-14 13:49:54,829 INFO L111 eAbstractionObserver]: Analyzing ICFG down.i [2021-12-14 13:49:54,832 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:49:54,832 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:49:54,857 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:49:54,862 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 [2021-12-14 13:49:54,862 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:49:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 13:49:54,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:54,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:54,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2021-12-14 13:49:54,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:54,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026034139] [2021-12-14 13:49:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:54,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:55,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026034139] [2021-12-14 13:49:55,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026034139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:49:55,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:49:55,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 13:49:55,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135717405] [2021-12-14 13:49:55,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:49:55,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:49:55,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:55,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:49:55,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:49:55,067 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:55,106 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-12-14 13:49:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:49:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 13:49:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:55,113 INFO L225 Difference]: With dead ends: 30 [2021-12-14 13:49:55,113 INFO L226 Difference]: Without dead ends: 10 [2021-12-14 13:49:55,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:49:55,118 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:55,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-14 13:49:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-14 13:49:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-14 13:49:55,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-12-14 13:49:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:55,139 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-14 13:49:55,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-14 13:49:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 13:49:55,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:55,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:55,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:49:55,140 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2021-12-14 13:49:55,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:55,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332898782] [2021-12-14 13:49:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:55,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:55,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332898782] [2021-12-14 13:49:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332898782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55240635] [2021-12-14 13:49:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:55,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:55,181 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) [2021-12-14 13:49:55,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:49:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 13:49:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:55,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:49:55,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55240635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:49:55,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 13:49:55,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-14 13:49:55,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804715514] [2021-12-14 13:49:55,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:49:55,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:49:55,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:49:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:49:55,260 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:55,286 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-12-14 13:49:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:49:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-14 13:49:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:55,287 INFO L225 Difference]: With dead ends: 20 [2021-12-14 13:49:55,287 INFO L226 Difference]: Without dead ends: 18 [2021-12-14 13:49:55,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:49:55,289 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:55,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-14 13:49:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2021-12-14 13:49:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-14 13:49:55,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-12-14 13:49:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:55,292 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-14 13:49:55,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-14 13:49:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 13:49:55,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:55,293 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:55,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:55,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:55,510 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2021-12-14 13:49:55,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:55,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142886458] [2021-12-14 13:49:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:55,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:55,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:55,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142886458] [2021-12-14 13:49:55,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142886458] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:55,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175376354] [2021-12-14 13:49:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:55,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:55,591 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) [2021-12-14 13:49:55,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:49:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:55,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 13:49:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:55,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:55,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175376354] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:55,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:55,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2021-12-14 13:49:55,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444695900] [2021-12-14 13:49:55,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:55,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:49:55,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:55,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:49:55,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:49:55,682 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:55,714 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-12-14 13:49:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 13:49:55,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 13:49:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:55,715 INFO L225 Difference]: With dead ends: 23 [2021-12-14 13:49:55,715 INFO L226 Difference]: Without dead ends: 13 [2021-12-14 13:49:55,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-14 13:49:55,717 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:55,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:55,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-14 13:49:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-14 13:49:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-14 13:49:55,720 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-12-14 13:49:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:55,720 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-14 13:49:55,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-14 13:49:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 13:49:55,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:55,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:55,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:55,948 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,SelfDestructingSolverStorable2 [2021-12-14 13:49:55,948 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2021-12-14 13:49:55,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:55,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148783824] [2021-12-14 13:49:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:55,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:56,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148783824] [2021-12-14 13:49:56,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148783824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716476906] [2021-12-14 13:49:56,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:49:56,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:56,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:56,011 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) [2021-12-14 13:49:56,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:49:56,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:49:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 13:49:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:56,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:56,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716476906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:56,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:56,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2021-12-14 13:49:56,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879978499] [2021-12-14 13:49:56,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:56,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:49:56,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:56,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:49:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:49:56,121 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:56,160 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-14 13:49:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 13:49:56,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 13:49:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:56,163 INFO L225 Difference]: With dead ends: 24 [2021-12-14 13:49:56,163 INFO L226 Difference]: Without dead ends: 22 [2021-12-14 13:49:56,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-14 13:49:56,164 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:56,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-14 13:49:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2021-12-14 13:49:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-14 13:49:56,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-12-14 13:49:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:56,167 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-14 13:49:56,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-12-14 13:49:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 13:49:56,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:56,168 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:56,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:56,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:56,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2021-12-14 13:49:56,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:56,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348573431] [2021-12-14 13:49:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:56,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:56,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348573431] [2021-12-14 13:49:56,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348573431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441446992] [2021-12-14 13:49:56,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:49:56,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:56,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:56,444 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) [2021-12-14 13:49:56,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 13:49:56,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:56,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 13:49:56,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:56,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:49:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:56,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:56,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441446992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:56,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:56,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2021-12-14 13:49:56,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12562790] [2021-12-14 13:49:56,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:56,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 13:49:56,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 13:49:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-14 13:49:56,558 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:56,603 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-14 13:49:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 13:49:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-14 13:49:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:56,604 INFO L225 Difference]: With dead ends: 30 [2021-12-14 13:49:56,604 INFO L226 Difference]: Without dead ends: 17 [2021-12-14 13:49:56,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:49:56,605 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:56,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-14 13:49:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-14 13:49:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-12-14 13:49:56,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-12-14 13:49:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:56,608 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-14 13:49:56,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-12-14 13:49:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:49:56,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:56,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:56,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:56,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:56,823 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2021-12-14 13:49:56,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:56,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204213859] [2021-12-14 13:49:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:56,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:56,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:56,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204213859] [2021-12-14 13:49:56,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204213859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:56,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408107445] [2021-12-14 13:49:56,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:49:56,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:56,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:56,899 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) [2021-12-14 13:49:56,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:49:56,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:49:56,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 13:49:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:56,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:57,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408107445] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:57,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:57,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-14 13:49:57,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809137434] [2021-12-14 13:49:57,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:57,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 13:49:57,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:57,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 13:49:57,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:49:57,040 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:57,105 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-12-14 13:49:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 13:49:57,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 13:49:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:57,106 INFO L225 Difference]: With dead ends: 28 [2021-12-14 13:49:57,106 INFO L226 Difference]: Without dead ends: 26 [2021-12-14 13:49:57,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:49:57,107 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:57,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-14 13:49:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2021-12-14 13:49:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-14 13:49:57,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-12-14 13:49:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:57,111 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-14 13:49:57,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-14 13:49:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 13:49:57,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:57,112 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:57,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 13:49:57,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:57,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2021-12-14 13:49:57,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:57,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985973909] [2021-12-14 13:49:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:57,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:57,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985973909] [2021-12-14 13:49:57,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985973909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999186571] [2021-12-14 13:49:57,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:49:57,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:57,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:57,399 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) [2021-12-14 13:49:57,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:49:57,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-14 13:49:57,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:57,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 13:49:57,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:57,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:57,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999186571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:57,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:57,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2021-12-14 13:49:57,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331750669] [2021-12-14 13:49:57,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:57,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 13:49:57,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 13:49:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-14 13:49:57,551 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:57,608 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-12-14 13:49:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 13:49:57,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-14 13:49:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:57,608 INFO L225 Difference]: With dead ends: 37 [2021-12-14 13:49:57,608 INFO L226 Difference]: Without dead ends: 21 [2021-12-14 13:49:57,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:49:57,609 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:57,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-14 13:49:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-14 13:49:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-14 13:49:57,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-12-14 13:49:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:57,612 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-14 13:49:57,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-14 13:49:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 13:49:57,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:57,613 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:57,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:57,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:57,823 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2021-12-14 13:49:57,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:57,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170876507] [2021-12-14 13:49:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:57,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:57,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:57,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170876507] [2021-12-14 13:49:57,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170876507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:57,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362588194] [2021-12-14 13:49:57,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:49:57,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:57,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:57,876 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) [2021-12-14 13:49:57,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 13:49:57,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-14 13:49:57,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 13:49:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:57,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:57,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362588194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:57,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:57,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2021-12-14 13:49:57,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006814172] [2021-12-14 13:49:57,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:57,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 13:49:57,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 13:49:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 13:49:57,998 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:58,067 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-12-14 13:49:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 13:49:58,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 13:49:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:58,068 INFO L225 Difference]: With dead ends: 32 [2021-12-14 13:49:58,068 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 13:49:58,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-12-14 13:49:58,069 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:58,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 13:49:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-14 13:49:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-14 13:49:58,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-12-14 13:49:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:58,072 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-14 13:49:58,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-14 13:49:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 13:49:58,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:58,073 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:58,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:58,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:58,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2021-12-14 13:49:58,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:58,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989576415] [2021-12-14 13:49:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:58,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:58,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:58,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989576415] [2021-12-14 13:49:58,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989576415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:58,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411058927] [2021-12-14 13:49:58,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:49:58,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:58,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:58,383 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) [2021-12-14 13:49:58,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 13:49:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 13:49:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:58,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:58,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411058927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:58,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:58,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2021-12-14 13:49:58,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636681657] [2021-12-14 13:49:58,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:58,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 13:49:58,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 13:49:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:49:58,515 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:58,601 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-12-14 13:49:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 13:49:58,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-14 13:49:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:58,602 INFO L225 Difference]: With dead ends: 44 [2021-12-14 13:49:58,602 INFO L226 Difference]: Without dead ends: 25 [2021-12-14 13:49:58,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-12-14 13:49:58,602 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:58,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 53 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-14 13:49:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-14 13:49:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-14 13:49:58,606 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2021-12-14 13:49:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:58,606 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-14 13:49:58,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-14 13:49:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 13:49:58,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:58,607 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:58,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:58,815 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,SelfDestructingSolverStorable8 [2021-12-14 13:49:58,816 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2021-12-14 13:49:58,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:58,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848672326] [2021-12-14 13:49:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:58,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:58,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:58,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848672326] [2021-12-14 13:49:58,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848672326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:58,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035576399] [2021-12-14 13:49:58,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:49:58,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:58,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:58,936 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) [2021-12-14 13:49:58,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 13:49:58,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:49:58,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:58,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 13:49:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:59,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:59,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035576399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:59,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:59,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-14 13:49:59,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46238854] [2021-12-14 13:49:59,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:59,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 13:49:59,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:59,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 13:49:59,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 13:49:59,090 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:59,172 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-14 13:49:59,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 13:49:59,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-14 13:49:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:59,174 INFO L225 Difference]: With dead ends: 36 [2021-12-14 13:49:59,174 INFO L226 Difference]: Without dead ends: 34 [2021-12-14 13:49:59,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-12-14 13:49:59,175 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:59,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-14 13:49:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-12-14 13:49:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-14 13:49:59,178 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2021-12-14 13:49:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:59,179 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-14 13:49:59,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-14 13:49:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 13:49:59,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:59,180 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:59,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:59,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 13:49:59,396 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2021-12-14 13:49:59,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:59,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600034712] [2021-12-14 13:49:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:59,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:59,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:59,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600034712] [2021-12-14 13:49:59,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600034712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:59,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207589081] [2021-12-14 13:49:59,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:49:59,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:59,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:59,486 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) [2021-12-14 13:49:59,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 13:49:59,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-14 13:49:59,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:49:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 13:49:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:49:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:59,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:49:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:59,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207589081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:49:59,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:49:59,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2021-12-14 13:49:59,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327565230] [2021-12-14 13:49:59,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:49:59,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 13:49:59,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:49:59,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 13:49:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-12-14 13:49:59,619 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:49:59,694 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-14 13:49:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 13:49:59,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-14 13:49:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:49:59,694 INFO L225 Difference]: With dead ends: 51 [2021-12-14 13:49:59,695 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 13:49:59,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-12-14 13:49:59,695 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:49:59,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:49:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 13:49:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-14 13:49:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-12-14 13:49:59,698 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2021-12-14 13:49:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:49:59,699 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-12-14 13:49:59,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:49:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-12-14 13:49:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 13:49:59,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:49:59,699 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-14 13:49:59,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 13:49:59,914 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,SelfDestructingSolverStorable10 [2021-12-14 13:49:59,915 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:49:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:49:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2021-12-14 13:49:59,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:49:59,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336368493] [2021-12-14 13:49:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:49:59,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:49:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:49:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:49:59,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:49:59,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336368493] [2021-12-14 13:49:59,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336368493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:49:59,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4809022] [2021-12-14 13:49:59,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:49:59,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:49:59,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:49:59,983 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) [2021-12-14 13:49:59,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 13:50:00,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 13:50:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:00,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:00,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4809022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:00,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:00,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-14 13:50:00,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991152382] [2021-12-14 13:50:00,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:00,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 13:50:00,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:00,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 13:50:00,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-14 13:50:00,125 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:00,194 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-12-14 13:50:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 13:50:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-14 13:50:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:00,195 INFO L225 Difference]: With dead ends: 40 [2021-12-14 13:50:00,195 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 13:50:00,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-12-14 13:50:00,196 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:00,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 35 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:50:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 13:50:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-14 13:50:00,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-14 13:50:00,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2021-12-14 13:50:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:00,199 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-14 13:50:00,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-14 13:50:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 13:50:00,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:00,200 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:00,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:00,416 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,SelfDestructingSolverStorable11 [2021-12-14 13:50:00,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2021-12-14 13:50:00,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:00,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081500744] [2021-12-14 13:50:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:00,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:00,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081500744] [2021-12-14 13:50:00,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081500744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69302724] [2021-12-14 13:50:00,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:00,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:00,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:00,507 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) [2021-12-14 13:50:00,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 13:50:00,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-14 13:50:00,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:00,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 13:50:00,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:00,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:00,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69302724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:00,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:00,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2021-12-14 13:50:00,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640764563] [2021-12-14 13:50:00,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:00,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 13:50:00,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 13:50:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-14 13:50:00,685 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:00,808 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-12-14 13:50:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 13:50:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-14 13:50:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:00,808 INFO L225 Difference]: With dead ends: 58 [2021-12-14 13:50:00,808 INFO L226 Difference]: Without dead ends: 33 [2021-12-14 13:50:00,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-12-14 13:50:00,809 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:00,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-14 13:50:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-14 13:50:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-14 13:50:00,812 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2021-12-14 13:50:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:00,812 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-14 13:50:00,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-14 13:50:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-14 13:50:00,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:00,813 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:00,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:01,023 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,SelfDestructingSolverStorable12 [2021-12-14 13:50:01,023 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:01,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2021-12-14 13:50:01,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:01,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476753141] [2021-12-14 13:50:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:01,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:01,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476753141] [2021-12-14 13:50:01,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476753141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:01,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657372060] [2021-12-14 13:50:01,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:01,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:01,085 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) [2021-12-14 13:50:01,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 13:50:01,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-14 13:50:01,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:01,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 13:50:01,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:01,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:01,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657372060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:01,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:01,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2021-12-14 13:50:01,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522387398] [2021-12-14 13:50:01,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:01,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 13:50:01,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 13:50:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-14 13:50:01,221 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:01,309 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-12-14 13:50:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 13:50:01,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-14 13:50:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:01,310 INFO L225 Difference]: With dead ends: 44 [2021-12-14 13:50:01,310 INFO L226 Difference]: Without dead ends: 42 [2021-12-14 13:50:01,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-12-14 13:50:01,311 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:01,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:50:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-14 13:50:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-12-14 13:50:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-14 13:50:01,314 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-12-14 13:50:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:01,314 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-14 13:50:01,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-14 13:50:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-14 13:50:01,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:01,315 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:01,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:01,529 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,SelfDestructingSolverStorable13 [2021-12-14 13:50:01,529 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2021-12-14 13:50:01,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:01,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806708569] [2021-12-14 13:50:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:01,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:01,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806708569] [2021-12-14 13:50:01,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806708569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860304969] [2021-12-14 13:50:01,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:50:01,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:01,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:01,643 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) [2021-12-14 13:50:01,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 13:50:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 13:50:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:01,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:01,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860304969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:01,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:01,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 20 [2021-12-14 13:50:01,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675223730] [2021-12-14 13:50:01,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:01,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 13:50:01,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:01,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 13:50:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-14 13:50:01,830 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:01,965 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-12-14 13:50:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 13:50:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-14 13:50:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:01,966 INFO L225 Difference]: With dead ends: 65 [2021-12-14 13:50:01,966 INFO L226 Difference]: Without dead ends: 37 [2021-12-14 13:50:01,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-12-14 13:50:01,967 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:01,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:50:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-14 13:50:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-14 13:50:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-14 13:50:01,970 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2021-12-14 13:50:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:01,970 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-14 13:50:01,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-14 13:50:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 13:50:01,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:01,971 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:01,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:02,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:02,186 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:02,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2021-12-14 13:50:02,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:02,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127161580] [2021-12-14 13:50:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:02,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:02,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:02,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127161580] [2021-12-14 13:50:02,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127161580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:02,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122830268] [2021-12-14 13:50:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:50:02,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:02,283 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) [2021-12-14 13:50:02,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 13:50:02,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:50:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:02,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 13:50:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:02,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:02,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122830268] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:02,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:02,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2021-12-14 13:50:02,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736403245] [2021-12-14 13:50:02,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:02,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 13:50:02,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 13:50:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:50:02,448 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:02,551 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-14 13:50:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 13:50:02,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-14 13:50:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:02,551 INFO L225 Difference]: With dead ends: 48 [2021-12-14 13:50:02,552 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 13:50:02,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-12-14 13:50:02,552 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:02,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 22 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:50:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 13:50:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-12-14 13:50:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-14 13:50:02,556 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2021-12-14 13:50:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:02,556 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-14 13:50:02,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-14 13:50:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 13:50:02,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:02,557 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:02,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:02,771 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,SelfDestructingSolverStorable15 [2021-12-14 13:50:02,771 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2021-12-14 13:50:02,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:02,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009238803] [2021-12-14 13:50:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:02,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:02,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:02,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009238803] [2021-12-14 13:50:02,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009238803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:02,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246925942] [2021-12-14 13:50:02,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:50:02,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:02,933 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) [2021-12-14 13:50:02,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 13:50:02,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-14 13:50:02,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:02,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 13:50:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:03,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:03,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246925942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:03,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:03,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 22 [2021-12-14 13:50:03,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058506178] [2021-12-14 13:50:03,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:03,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 13:50:03,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:03,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 13:50:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-12-14 13:50:03,104 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:03,231 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-12-14 13:50:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 13:50:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 13:50:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:03,232 INFO L225 Difference]: With dead ends: 72 [2021-12-14 13:50:03,232 INFO L226 Difference]: Without dead ends: 41 [2021-12-14 13:50:03,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-12-14 13:50:03,233 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:03,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:50:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-14 13:50:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-14 13:50:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-14 13:50:03,236 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2021-12-14 13:50:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:03,236 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-14 13:50:03,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-14 13:50:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 13:50:03,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:03,237 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:03,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:03,447 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,SelfDestructingSolverStorable16 [2021-12-14 13:50:03,447 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:03,448 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2021-12-14 13:50:03,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:03,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25977146] [2021-12-14 13:50:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:03,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:03,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25977146] [2021-12-14 13:50:03,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25977146] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:03,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106013129] [2021-12-14 13:50:03,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:50:03,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:03,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:03,531 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) [2021-12-14 13:50:03,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 13:50:03,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:03,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-14 13:50:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:03,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:03,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106013129] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:03,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:03,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2021-12-14 13:50:03,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359855998] [2021-12-14 13:50:03,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:03,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 13:50:03,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:03,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 13:50:03,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 13:50:03,713 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:03,824 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-12-14 13:50:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 13:50:03,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-14 13:50:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:03,824 INFO L225 Difference]: With dead ends: 52 [2021-12-14 13:50:03,825 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 13:50:03,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2021-12-14 13:50:03,825 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:03,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 37 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 13:50:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-12-14 13:50:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-12-14 13:50:03,841 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2021-12-14 13:50:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:03,842 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-12-14 13:50:03,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-12-14 13:50:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 13:50:03,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:03,842 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:03,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:04,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 13:50:04,052 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2021-12-14 13:50:04,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:04,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488237521] [2021-12-14 13:50:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:04,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:04,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:04,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488237521] [2021-12-14 13:50:04,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488237521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:04,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827974521] [2021-12-14 13:50:04,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:04,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:04,207 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) [2021-12-14 13:50:04,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 13:50:04,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-14 13:50:04,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 13:50:04,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:04,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:04,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827974521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:04,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:04,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 24 [2021-12-14 13:50:04,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416605983] [2021-12-14 13:50:04,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:04,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 13:50:04,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 13:50:04,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-12-14 13:50:04,392 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:04,532 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-12-14 13:50:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 13:50:04,532 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-14 13:50:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:04,532 INFO L225 Difference]: With dead ends: 79 [2021-12-14 13:50:04,532 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 13:50:04,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 13:50:04,533 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:04,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:50:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 13:50:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-14 13:50:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-14 13:50:04,537 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2021-12-14 13:50:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:04,537 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-14 13:50:04,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-14 13:50:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 13:50:04,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:04,538 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:04,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:04,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:04,742 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2021-12-14 13:50:04,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:04,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911368929] [2021-12-14 13:50:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:04,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:04,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:04,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911368929] [2021-12-14 13:50:04,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911368929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:04,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037295934] [2021-12-14 13:50:04,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:04,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:04,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:04,828 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) [2021-12-14 13:50:04,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 13:50:04,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-14 13:50:04,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:04,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 13:50:04,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:04,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:05,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037295934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:05,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:05,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2021-12-14 13:50:05,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698940746] [2021-12-14 13:50:05,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:05,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 13:50:05,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:05,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 13:50:05,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-14 13:50:05,011 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:05,127 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-14 13:50:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-14 13:50:05,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-14 13:50:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:05,128 INFO L225 Difference]: With dead ends: 56 [2021-12-14 13:50:05,128 INFO L226 Difference]: Without dead ends: 54 [2021-12-14 13:50:05,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-12-14 13:50:05,129 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:05,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 30 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-14 13:50:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-14 13:50:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-12-14 13:50:05,132 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-12-14 13:50:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:05,132 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-12-14 13:50:05,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-12-14 13:50:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 13:50:05,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:05,133 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:05,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:05,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:05,336 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:05,337 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2021-12-14 13:50:05,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:05,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922816315] [2021-12-14 13:50:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:05,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:05,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:05,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922816315] [2021-12-14 13:50:05,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922816315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:05,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117306223] [2021-12-14 13:50:05,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:50:05,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:05,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:05,580 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) [2021-12-14 13:50:05,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-14 13:50:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 13:50:05,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:05,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:05,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117306223] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:05,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:05,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2021-12-14 13:50:05,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993295075] [2021-12-14 13:50:05,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:05,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 13:50:05,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 13:50:05,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-12-14 13:50:05,823 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:06,034 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-12-14 13:50:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 13:50:06,035 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-14 13:50:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:06,035 INFO L225 Difference]: With dead ends: 86 [2021-12-14 13:50:06,035 INFO L226 Difference]: Without dead ends: 49 [2021-12-14 13:50:06,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 13:50:06,036 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:06,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-14 13:50:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-14 13:50:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-12-14 13:50:06,039 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2021-12-14 13:50:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:06,039 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-12-14 13:50:06,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-12-14 13:50:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 13:50:06,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:06,039 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:06,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:06,248 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,SelfDestructingSolverStorable20 [2021-12-14 13:50:06,248 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2021-12-14 13:50:06,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:06,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496377144] [2021-12-14 13:50:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:06,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:06,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:06,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496377144] [2021-12-14 13:50:06,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496377144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:06,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259117187] [2021-12-14 13:50:06,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:50:06,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:06,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:06,383 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) [2021-12-14 13:50:06,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-14 13:50:06,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:50:06,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:06,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 13:50:06,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:06,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:06,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259117187] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:06,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:06,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2021-12-14 13:50:06,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912570163] [2021-12-14 13:50:06,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:06,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 13:50:06,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 13:50:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:50:06,586 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:06,718 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-12-14 13:50:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 13:50:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-14 13:50:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:06,719 INFO L225 Difference]: With dead ends: 60 [2021-12-14 13:50:06,719 INFO L226 Difference]: Without dead ends: 58 [2021-12-14 13:50:06,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-12-14 13:50:06,720 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:06,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 23 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-14 13:50:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-12-14 13:50:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-14 13:50:06,723 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2021-12-14 13:50:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:06,723 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-14 13:50:06,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-14 13:50:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 13:50:06,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:06,724 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:06,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:06,933 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,SelfDestructingSolverStorable21 [2021-12-14 13:50:06,933 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:06,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2021-12-14 13:50:06,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:06,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486489267] [2021-12-14 13:50:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:06,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:07,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:07,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486489267] [2021-12-14 13:50:07,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486489267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:07,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746462209] [2021-12-14 13:50:07,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:50:07,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:07,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:07,113 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) [2021-12-14 13:50:07,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-14 13:50:07,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-14 13:50:07,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:07,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 13:50:07,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:07,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:07,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746462209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:07,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:07,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 28 [2021-12-14 13:50:07,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749667886] [2021-12-14 13:50:07,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:07,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 13:50:07,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 13:50:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-12-14 13:50:07,318 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:07,498 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-12-14 13:50:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-14 13:50:07,498 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-14 13:50:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:07,498 INFO L225 Difference]: With dead ends: 93 [2021-12-14 13:50:07,499 INFO L226 Difference]: Without dead ends: 53 [2021-12-14 13:50:07,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2021-12-14 13:50:07,500 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:07,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-14 13:50:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-14 13:50:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-14 13:50:07,503 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2021-12-14 13:50:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:07,503 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-14 13:50:07,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-14 13:50:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 13:50:07,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:07,504 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:07,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:07,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:07,721 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2021-12-14 13:50:07,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:07,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889294329] [2021-12-14 13:50:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:07,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:07,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889294329] [2021-12-14 13:50:07,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889294329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185411416] [2021-12-14 13:50:07,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:50:07,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:07,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:07,832 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) [2021-12-14 13:50:07,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-14 13:50:07,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:07,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:07,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 13:50:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:07,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:08,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185411416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:08,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:08,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2021-12-14 13:50:08,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550507430] [2021-12-14 13:50:08,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:08,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 13:50:08,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 13:50:08,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-12-14 13:50:08,035 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:08,183 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-12-14 13:50:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 13:50:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-14 13:50:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:08,184 INFO L225 Difference]: With dead ends: 64 [2021-12-14 13:50:08,184 INFO L226 Difference]: Without dead ends: 62 [2021-12-14 13:50:08,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2021-12-14 13:50:08,184 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:08,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 34 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-14 13:50:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-12-14 13:50:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-14 13:50:08,187 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2021-12-14 13:50:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:08,188 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-14 13:50:08,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-14 13:50:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 13:50:08,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:08,188 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:08,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:08,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:08,395 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:08,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2021-12-14 13:50:08,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:08,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000494553] [2021-12-14 13:50:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:08,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:08,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:08,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000494553] [2021-12-14 13:50:08,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000494553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:08,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641509303] [2021-12-14 13:50:08,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:08,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:08,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:08,593 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) [2021-12-14 13:50:08,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-14 13:50:08,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-14 13:50:08,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:08,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 13:50:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:08,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:08,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641509303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:08,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:08,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 30 [2021-12-14 13:50:08,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574458274] [2021-12-14 13:50:08,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:08,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 13:50:08,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:08,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 13:50:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-12-14 13:50:08,790 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:09,014 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-12-14 13:50:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 13:50:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 13:50:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:09,015 INFO L225 Difference]: With dead ends: 100 [2021-12-14 13:50:09,015 INFO L226 Difference]: Without dead ends: 57 [2021-12-14 13:50:09,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 13:50:09,016 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:09,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 123 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-14 13:50:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-14 13:50:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-12-14 13:50:09,019 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2021-12-14 13:50:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:09,019 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-12-14 13:50:09,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-12-14 13:50:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 13:50:09,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:09,024 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:09,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:09,235 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,SelfDestructingSolverStorable24 [2021-12-14 13:50:09,235 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2021-12-14 13:50:09,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:09,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927369471] [2021-12-14 13:50:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:09,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:09,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:09,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927369471] [2021-12-14 13:50:09,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927369471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:09,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387524499] [2021-12-14 13:50:09,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:09,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:09,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:09,385 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) [2021-12-14 13:50:09,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-14 13:50:09,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-14 13:50:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:09,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 13:50:09,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:09,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:09,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387524499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:09,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:09,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2021-12-14 13:50:09,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126636190] [2021-12-14 13:50:09,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:09,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 13:50:09,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 13:50:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-12-14 13:50:09,600 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:09,753 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-12-14 13:50:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 13:50:09,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-14 13:50:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:09,754 INFO L225 Difference]: With dead ends: 68 [2021-12-14 13:50:09,754 INFO L226 Difference]: Without dead ends: 66 [2021-12-14 13:50:09,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 13:50:09,755 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:09,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 31 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:09,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-14 13:50:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-14 13:50:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-12-14 13:50:09,758 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2021-12-14 13:50:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:09,759 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-12-14 13:50:09,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-12-14 13:50:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 13:50:09,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:09,759 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:09,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:09,971 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,SelfDestructingSolverStorable25 [2021-12-14 13:50:09,971 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:09,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:09,972 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2021-12-14 13:50:09,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:09,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616061724] [2021-12-14 13:50:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:09,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:10,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:10,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616061724] [2021-12-14 13:50:10,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616061724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:10,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653355710] [2021-12-14 13:50:10,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:50:10,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:10,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:10,165 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) [2021-12-14 13:50:10,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-14 13:50:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-14 13:50:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:10,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:10,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653355710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:10,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:10,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 32 [2021-12-14 13:50:10,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133024253] [2021-12-14 13:50:10,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:10,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 13:50:10,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:10,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 13:50:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2021-12-14 13:50:10,416 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:10,647 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-12-14 13:50:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 13:50:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-14 13:50:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:10,648 INFO L225 Difference]: With dead ends: 107 [2021-12-14 13:50:10,648 INFO L226 Difference]: Without dead ends: 61 [2021-12-14 13:50:10,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2021-12-14 13:50:10,649 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:10,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 147 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-14 13:50:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-14 13:50:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-12-14 13:50:10,652 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2021-12-14 13:50:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:10,652 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-12-14 13:50:10,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-12-14 13:50:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 13:50:10,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:10,653 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:10,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:10,863 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,SelfDestructingSolverStorable26 [2021-12-14 13:50:10,863 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2021-12-14 13:50:10,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:10,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222580860] [2021-12-14 13:50:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:10,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:11,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:11,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222580860] [2021-12-14 13:50:11,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222580860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:11,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675647778] [2021-12-14 13:50:11,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:50:11,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:11,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:11,003 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) [2021-12-14 13:50:11,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-14 13:50:11,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:50:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:11,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-14 13:50:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:11,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:11,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675647778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:11,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:11,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2021-12-14 13:50:11,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735550527] [2021-12-14 13:50:11,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:11,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 13:50:11,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 13:50:11,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-12-14 13:50:11,285 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:11,458 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-12-14 13:50:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 13:50:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-14 13:50:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:11,459 INFO L225 Difference]: With dead ends: 72 [2021-12-14 13:50:11,459 INFO L226 Difference]: Without dead ends: 70 [2021-12-14 13:50:11,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 13:50:11,460 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:11,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 31 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-14 13:50:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-12-14 13:50:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-12-14 13:50:11,463 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2021-12-14 13:50:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:11,463 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-12-14 13:50:11,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-12-14 13:50:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 13:50:11,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:11,464 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:11,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:11,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-14 13:50:11,671 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2021-12-14 13:50:11,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20825376] [2021-12-14 13:50:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:11,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:11,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20825376] [2021-12-14 13:50:11,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20825376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076785350] [2021-12-14 13:50:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:50:11,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:11,962 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:11,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-14 13:50:12,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-14 13:50:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 13:50:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:12,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:12,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076785350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:12,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:12,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 34 [2021-12-14 13:50:12,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080899914] [2021-12-14 13:50:12,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:12,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 13:50:12,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 13:50:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 13:50:12,235 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:12,495 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-12-14 13:50:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 13:50:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-14 13:50:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:12,496 INFO L225 Difference]: With dead ends: 114 [2021-12-14 13:50:12,496 INFO L226 Difference]: Without dead ends: 65 [2021-12-14 13:50:12,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1856, Unknown=0, NotChecked=0, Total=2450 [2021-12-14 13:50:12,497 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:12,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-14 13:50:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-14 13:50:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-12-14 13:50:12,500 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2021-12-14 13:50:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:12,500 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-12-14 13:50:12,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-12-14 13:50:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 13:50:12,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:12,501 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:12,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:12,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-14 13:50:12,701 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2021-12-14 13:50:12,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:12,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093402624] [2021-12-14 13:50:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:12,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:12,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093402624] [2021-12-14 13:50:12,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093402624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233062962] [2021-12-14 13:50:12,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:50:12,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:12,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:12,824 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:12,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-14 13:50:12,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:12,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 13:50:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:12,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:13,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233062962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:13,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:13,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2021-12-14 13:50:13,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629932721] [2021-12-14 13:50:13,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:13,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 13:50:13,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 13:50:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-12-14 13:50:13,107 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:13,292 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-14 13:50:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 13:50:13,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-14 13:50:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:13,293 INFO L225 Difference]: With dead ends: 76 [2021-12-14 13:50:13,293 INFO L226 Difference]: Without dead ends: 74 [2021-12-14 13:50:13,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 13:50:13,295 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:13,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 33 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:13,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-14 13:50:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-14 13:50:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-14 13:50:13,300 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2021-12-14 13:50:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:13,300 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-14 13:50:13,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-14 13:50:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 13:50:13,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:13,301 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:13,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-14 13:50:13,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:13,517 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:13,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2021-12-14 13:50:13,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:13,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747197287] [2021-12-14 13:50:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:13,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:13,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747197287] [2021-12-14 13:50:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747197287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579554640] [2021-12-14 13:50:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:13,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:13,879 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:13,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-14 13:50:13,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-14 13:50:13,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:13,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 13:50:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:14,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:14,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579554640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:14,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:14,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 36 [2021-12-14 13:50:14,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554769867] [2021-12-14 13:50:14,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:14,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 13:50:14,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:14,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 13:50:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 13:50:14,163 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:14,418 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2021-12-14 13:50:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 13:50:14,418 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-14 13:50:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:14,419 INFO L225 Difference]: With dead ends: 121 [2021-12-14 13:50:14,419 INFO L226 Difference]: Without dead ends: 69 [2021-12-14 13:50:14,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2021-12-14 13:50:14,420 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:14,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-14 13:50:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-14 13:50:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-14 13:50:14,423 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2021-12-14 13:50:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:14,424 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-14 13:50:14,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-14 13:50:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 13:50:14,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:14,424 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:14,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:14,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-14 13:50:14,625 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2021-12-14 13:50:14,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:14,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650383383] [2021-12-14 13:50:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:14,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:14,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650383383] [2021-12-14 13:50:14,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650383383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965737054] [2021-12-14 13:50:14,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:14,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:14,785 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:14,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-14 13:50:14,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-14 13:50:14,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:14,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-14 13:50:14,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:14,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:15,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965737054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:15,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:15,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2021-12-14 13:50:15,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862677293] [2021-12-14 13:50:15,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:15,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 13:50:15,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 13:50:15,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2021-12-14 13:50:15,117 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:15,311 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-12-14 13:50:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-14 13:50:15,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 13:50:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:15,312 INFO L225 Difference]: With dead ends: 80 [2021-12-14 13:50:15,312 INFO L226 Difference]: Without dead ends: 78 [2021-12-14 13:50:15,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 13:50:15,312 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:15,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-14 13:50:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-12-14 13:50:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-14 13:50:15,316 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2021-12-14 13:50:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:15,316 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-14 13:50:15,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-14 13:50:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 13:50:15,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:15,317 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:15,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:15,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:15,527 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2021-12-14 13:50:15,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:15,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474802303] [2021-12-14 13:50:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:15,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:15,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:15,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474802303] [2021-12-14 13:50:15,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474802303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:15,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83244402] [2021-12-14 13:50:15,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:50:15,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:15,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:15,875 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:15,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-14 13:50:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 13:50:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:16,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:16,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83244402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:16,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:16,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 38 [2021-12-14 13:50:16,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075189716] [2021-12-14 13:50:16,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:16,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-14 13:50:16,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-14 13:50:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 13:50:16,141 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:16,422 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-12-14 13:50:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 13:50:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-14 13:50:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:16,423 INFO L225 Difference]: With dead ends: 128 [2021-12-14 13:50:16,423 INFO L226 Difference]: Without dead ends: 73 [2021-12-14 13:50:16,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=2340, Unknown=0, NotChecked=0, Total=3080 [2021-12-14 13:50:16,425 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:16,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 121 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-14 13:50:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-14 13:50:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-12-14 13:50:16,429 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2021-12-14 13:50:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:16,429 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-12-14 13:50:16,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-12-14 13:50:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 13:50:16,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:16,430 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:16,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-14 13:50:16,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:16,644 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2021-12-14 13:50:16,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:16,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357400677] [2021-12-14 13:50:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:16,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:16,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:16,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357400677] [2021-12-14 13:50:16,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357400677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:16,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673775970] [2021-12-14 13:50:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:50:16,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:16,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:16,818 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:16,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-14 13:50:16,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:50:16,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-14 13:50:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:16,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:17,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673775970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:17,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:17,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2021-12-14 13:50:17,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675248669] [2021-12-14 13:50:17,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:17,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 13:50:17,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:17,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 13:50:17,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-12-14 13:50:17,057 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:17,272 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-12-14 13:50:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 13:50:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-14 13:50:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:17,273 INFO L225 Difference]: With dead ends: 84 [2021-12-14 13:50:17,273 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 13:50:17,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2021-12-14 13:50:17,274 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:17,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 31 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 13:50:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-12-14 13:50:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-12-14 13:50:17,278 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2021-12-14 13:50:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:17,278 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-12-14 13:50:17,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-12-14 13:50:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 13:50:17,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:17,279 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:17,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:17,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-14 13:50:17,488 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2021-12-14 13:50:17,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:17,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115627781] [2021-12-14 13:50:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:17,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:17,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:17,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115627781] [2021-12-14 13:50:17,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115627781] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:17,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904554059] [2021-12-14 13:50:17,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:50:17,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:17,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:17,903 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:17,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-14 13:50:17,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-14 13:50:17,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:17,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 13:50:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:18,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904554059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:18,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:18,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 40 [2021-12-14 13:50:18,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662448307] [2021-12-14 13:50:18,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:18,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-14 13:50:18,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:18,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-14 13:50:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 13:50:18,228 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:18,581 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-12-14 13:50:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-14 13:50:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-14 13:50:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:18,582 INFO L225 Difference]: With dead ends: 135 [2021-12-14 13:50:18,582 INFO L226 Difference]: Without dead ends: 77 [2021-12-14 13:50:18,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=819, Invalid=2603, Unknown=0, NotChecked=0, Total=3422 [2021-12-14 13:50:18,584 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:18,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-14 13:50:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-14 13:50:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-12-14 13:50:18,588 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2021-12-14 13:50:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:18,588 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-12-14 13:50:18,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-12-14 13:50:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-14 13:50:18,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:18,589 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:18,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:18,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-14 13:50:18,805 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:18,806 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2021-12-14 13:50:18,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:18,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750579146] [2021-12-14 13:50:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:18,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:19,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750579146] [2021-12-14 13:50:19,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750579146] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221037230] [2021-12-14 13:50:19,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:50:19,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:19,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:19,027 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:19,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-14 13:50:19,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:19,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-14 13:50:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:19,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:19,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221037230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:19,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:19,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2021-12-14 13:50:19,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54466939] [2021-12-14 13:50:19,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:19,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 13:50:19,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 13:50:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2021-12-14 13:50:19,281 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:19,428 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-12-14 13:50:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-14 13:50:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-14 13:50:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:19,429 INFO L225 Difference]: With dead ends: 88 [2021-12-14 13:50:19,429 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 13:50:19,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 13:50:19,430 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:19,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 13:50:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-12-14 13:50:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-12-14 13:50:19,437 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2021-12-14 13:50:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:19,437 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-12-14 13:50:19,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-12-14 13:50:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 13:50:19,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:19,438 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:19,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:19,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-14 13:50:19,654 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:19,655 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2021-12-14 13:50:19,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:19,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523927797] [2021-12-14 13:50:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:19,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:20,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:20,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523927797] [2021-12-14 13:50:20,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523927797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:20,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241516863] [2021-12-14 13:50:20,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:20,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:20,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:20,108 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:20,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-14 13:50:20,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-14 13:50:20,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-14 13:50:20,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:20,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241516863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:20,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:20,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 42 [2021-12-14 13:50:20,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74845404] [2021-12-14 13:50:20,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:20,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-14 13:50:20,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-14 13:50:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2021-12-14 13:50:20,388 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:20,744 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2021-12-14 13:50:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 13:50:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 13:50:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:20,745 INFO L225 Difference]: With dead ends: 142 [2021-12-14 13:50:20,745 INFO L226 Difference]: Without dead ends: 81 [2021-12-14 13:50:20,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=902, Invalid=2880, Unknown=0, NotChecked=0, Total=3782 [2021-12-14 13:50:20,746 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:20,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 128 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-14 13:50:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-14 13:50:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-12-14 13:50:20,751 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2021-12-14 13:50:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:20,751 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-12-14 13:50:20,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-12-14 13:50:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 13:50:20,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:20,751 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:20,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:20,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:20,967 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:20,967 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2021-12-14 13:50:20,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:20,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904990487] [2021-12-14 13:50:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:20,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:21,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:21,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904990487] [2021-12-14 13:50:21,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904990487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:21,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373112478] [2021-12-14 13:50:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:21,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:21,187 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:21,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-14 13:50:21,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-14 13:50:21,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:21,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-14 13:50:21,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:21,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:21,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373112478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:21,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:21,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2021-12-14 13:50:21,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460859095] [2021-12-14 13:50:21,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:21,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 13:50:21,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 13:50:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2021-12-14 13:50:21,533 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:21,773 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-12-14 13:50:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-14 13:50:21,773 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-14 13:50:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:21,774 INFO L225 Difference]: With dead ends: 92 [2021-12-14 13:50:21,774 INFO L226 Difference]: Without dead ends: 90 [2021-12-14 13:50:21,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 13:50:21,775 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:21,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 35 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-14 13:50:21,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-12-14 13:50:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-12-14 13:50:21,780 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2021-12-14 13:50:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:21,780 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-12-14 13:50:21,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-12-14 13:50:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 13:50:21,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:21,780 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:21,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:21,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-14 13:50:21,990 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:21,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2021-12-14 13:50:21,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:21,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136997880] [2021-12-14 13:50:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:21,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:22,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:22,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136997880] [2021-12-14 13:50:22,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136997880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:22,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604602744] [2021-12-14 13:50:22,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:50:22,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:22,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:22,451 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:22,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-14 13:50:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:22,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-14 13:50:22,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:22,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:22,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604602744] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:22,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:22,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2021-12-14 13:50:22,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119930773] [2021-12-14 13:50:22,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:22,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-14 13:50:22,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-14 13:50:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 13:50:22,800 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:23,196 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-12-14 13:50:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-14 13:50:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-14 13:50:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:23,197 INFO L225 Difference]: With dead ends: 149 [2021-12-14 13:50:23,197 INFO L226 Difference]: Without dead ends: 85 [2021-12-14 13:50:23,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=989, Invalid=3171, Unknown=0, NotChecked=0, Total=4160 [2021-12-14 13:50:23,198 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:23,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 171 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-14 13:50:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-14 13:50:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-12-14 13:50:23,203 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2021-12-14 13:50:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:23,204 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-12-14 13:50:23,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-12-14 13:50:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-14 13:50:23,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:23,204 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:23,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:23,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-14 13:50:23,421 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:23,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:23,422 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2021-12-14 13:50:23,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:23,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707725066] [2021-12-14 13:50:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:23,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:23,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:23,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707725066] [2021-12-14 13:50:23,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707725066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:23,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281453705] [2021-12-14 13:50:23,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:50:23,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:23,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:23,613 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:23,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-14 13:50:23,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:50:23,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:23,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-14 13:50:23,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:23,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:23,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281453705] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:23,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:23,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2021-12-14 13:50:23,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295669906] [2021-12-14 13:50:23,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:23,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 13:50:23,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 13:50:23,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2021-12-14 13:50:23,899 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:24,170 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2021-12-14 13:50:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-14 13:50:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-14 13:50:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:24,170 INFO L225 Difference]: With dead ends: 96 [2021-12-14 13:50:24,171 INFO L226 Difference]: Without dead ends: 94 [2021-12-14 13:50:24,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 13:50:24,171 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:24,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 37 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-14 13:50:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-12-14 13:50:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-12-14 13:50:24,177 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2021-12-14 13:50:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:24,177 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-12-14 13:50:24,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-12-14 13:50:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 13:50:24,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:24,177 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:24,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:24,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-14 13:50:24,398 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2021-12-14 13:50:24,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079192335] [2021-12-14 13:50:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:24,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:24,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:24,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079192335] [2021-12-14 13:50:24,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079192335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:24,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673233947] [2021-12-14 13:50:24,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:50:24,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:24,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:24,924 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:24,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-14 13:50:24,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-12-14 13:50:24,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:24,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-14 13:50:24,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:25,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:25,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673233947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:25,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:25,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 46 [2021-12-14 13:50:25,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409958061] [2021-12-14 13:50:25,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:25,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-14 13:50:25,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-14 13:50:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 13:50:25,305 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:25,672 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-12-14 13:50:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-14 13:50:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-14 13:50:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:25,673 INFO L225 Difference]: With dead ends: 156 [2021-12-14 13:50:25,673 INFO L226 Difference]: Without dead ends: 89 [2021-12-14 13:50:25,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-12-14 13:50:25,674 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:25,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-14 13:50:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-14 13:50:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-14 13:50:25,680 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2021-12-14 13:50:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:25,680 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-14 13:50:25,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-14 13:50:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 13:50:25,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:25,681 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:25,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-14 13:50:25,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-14 13:50:25,898 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2021-12-14 13:50:25,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:25,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541885900] [2021-12-14 13:50:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:25,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:26,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:26,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541885900] [2021-12-14 13:50:26,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541885900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:26,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231161969] [2021-12-14 13:50:26,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:50:26,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:26,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:26,151 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:26,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-14 13:50:26,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-14 13:50:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:26,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:26,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231161969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:26,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:26,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2021-12-14 13:50:26,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888623995] [2021-12-14 13:50:26,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:26,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 13:50:26,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 13:50:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2021-12-14 13:50:26,489 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:26,704 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-12-14 13:50:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 13:50:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-14 13:50:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:26,705 INFO L225 Difference]: With dead ends: 100 [2021-12-14 13:50:26,705 INFO L226 Difference]: Without dead ends: 98 [2021-12-14 13:50:26,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2021-12-14 13:50:26,708 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 76 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:26,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 36 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-14 13:50:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2021-12-14 13:50:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-12-14 13:50:26,714 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2021-12-14 13:50:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:26,715 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-12-14 13:50:26,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-12-14 13:50:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 13:50:26,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:26,716 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:26,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:26,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:26,925 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2021-12-14 13:50:26,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:26,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101620999] [2021-12-14 13:50:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:26,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:27,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:27,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101620999] [2021-12-14 13:50:27,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101620999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:27,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235781126] [2021-12-14 13:50:27,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:27,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:27,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:27,462 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:27,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-14 13:50:27,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-14 13:50:27,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-14 13:50:27,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:27,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:27,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235781126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:27,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:27,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 48 [2021-12-14 13:50:27,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073758422] [2021-12-14 13:50:27,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:27,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-14 13:50:27,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-14 13:50:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 13:50:27,725 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:28,049 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2021-12-14 13:50:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-14 13:50:28,049 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-14 13:50:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:28,050 INFO L225 Difference]: With dead ends: 163 [2021-12-14 13:50:28,050 INFO L226 Difference]: Without dead ends: 93 [2021-12-14 13:50:28,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1175, Invalid=3795, Unknown=0, NotChecked=0, Total=4970 [2021-12-14 13:50:28,054 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:28,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-14 13:50:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-14 13:50:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-12-14 13:50:28,061 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2021-12-14 13:50:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:28,061 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-12-14 13:50:28,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-12-14 13:50:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 13:50:28,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:28,062 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:28,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-14 13:50:28,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:28,269 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2021-12-14 13:50:28,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:28,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014586006] [2021-12-14 13:50:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:28,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:28,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:28,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014586006] [2021-12-14 13:50:28,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014586006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:28,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054911811] [2021-12-14 13:50:28,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:28,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:28,599 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:28,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-14 13:50:28,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-14 13:50:28,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-14 13:50:28,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:28,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:28,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054911811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:28,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:28,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2021-12-14 13:50:28,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053007553] [2021-12-14 13:50:28,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:28,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 13:50:28,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 13:50:28,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2021-12-14 13:50:28,962 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:29,282 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-12-14 13:50:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-14 13:50:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-14 13:50:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:29,283 INFO L225 Difference]: With dead ends: 104 [2021-12-14 13:50:29,283 INFO L226 Difference]: Without dead ends: 102 [2021-12-14 13:50:29,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2021-12-14 13:50:29,284 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:29,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-14 13:50:29,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-12-14 13:50:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-14 13:50:29,304 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2021-12-14 13:50:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:29,304 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-14 13:50:29,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-14 13:50:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-14 13:50:29,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:29,305 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:29,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:29,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-14 13:50:29,505 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2021-12-14 13:50:29,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:29,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330513112] [2021-12-14 13:50:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:29,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:30,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:30,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330513112] [2021-12-14 13:50:30,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330513112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:30,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781225] [2021-12-14 13:50:30,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:50:30,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:30,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:30,112 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:30,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-14 13:50:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:30,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 13:50:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:30,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:30,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:30,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:30,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 50 [2021-12-14 13:50:30,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091405151] [2021-12-14 13:50:30,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:30,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-14 13:50:30,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-14 13:50:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2021-12-14 13:50:30,502 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:30,996 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-12-14 13:50:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 13:50:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-14 13:50:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:30,997 INFO L225 Difference]: With dead ends: 170 [2021-12-14 13:50:30,997 INFO L226 Difference]: Without dead ends: 97 [2021-12-14 13:50:30,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2021-12-14 13:50:30,998 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:30,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 205 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-14 13:50:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-12-14 13:50:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-12-14 13:50:31,005 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2021-12-14 13:50:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:31,005 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-12-14 13:50:31,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-12-14 13:50:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-14 13:50:31,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:31,006 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:31,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-14 13:50:31,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-14 13:50:31,207 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2021-12-14 13:50:31,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:31,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971529603] [2021-12-14 13:50:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:31,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:31,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:31,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971529603] [2021-12-14 13:50:31,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971529603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:31,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690293090] [2021-12-14 13:50:31,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:50:31,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:31,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:31,490 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:31,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-14 13:50:31,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:50:31,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-14 13:50:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:31,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:31,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690293090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:31,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:31,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2021-12-14 13:50:31,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906260568] [2021-12-14 13:50:31,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:31,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 13:50:31,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 13:50:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2021-12-14 13:50:31,912 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:32,221 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2021-12-14 13:50:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-14 13:50:32,221 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-14 13:50:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:32,221 INFO L225 Difference]: With dead ends: 108 [2021-12-14 13:50:32,221 INFO L226 Difference]: Without dead ends: 106 [2021-12-14 13:50:32,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 13:50:32,222 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:32,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 33 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-14 13:50:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-12-14 13:50:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-14 13:50:32,233 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2021-12-14 13:50:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:32,234 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-14 13:50:32,234 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-14 13:50:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 13:50:32,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:32,234 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:32,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:32,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-14 13:50:32,447 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:32,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2021-12-14 13:50:32,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:32,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90315813] [2021-12-14 13:50:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:32,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:32,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:32,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90315813] [2021-12-14 13:50:32,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90315813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:32,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568735281] [2021-12-14 13:50:32,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:50:32,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:32,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:32,989 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:32,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-14 13:50:33,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-14 13:50:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 13:50:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:33,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:33,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568735281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:33,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:33,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 52 [2021-12-14 13:50:33,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182528088] [2021-12-14 13:50:33,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:33,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-14 13:50:33,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-14 13:50:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2021-12-14 13:50:33,251 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:33,598 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2021-12-14 13:50:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-14 13:50:33,599 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-14 13:50:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:33,599 INFO L225 Difference]: With dead ends: 177 [2021-12-14 13:50:33,599 INFO L226 Difference]: Without dead ends: 101 [2021-12-14 13:50:33,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1377, Invalid=4475, Unknown=0, NotChecked=0, Total=5852 [2021-12-14 13:50:33,601 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:33,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 227 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-14 13:50:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-14 13:50:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-12-14 13:50:33,607 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2021-12-14 13:50:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:33,608 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-12-14 13:50:33,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-12-14 13:50:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 13:50:33,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:33,608 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:33,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-14 13:50:33,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:33,825 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:33,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2021-12-14 13:50:33,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:33,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318044356] [2021-12-14 13:50:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:33,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:34,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:34,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318044356] [2021-12-14 13:50:34,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318044356] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:34,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844075028] [2021-12-14 13:50:34,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:50:34,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:34,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:34,114 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:34,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-14 13:50:34,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:34,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:34,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-14 13:50:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:34,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:34,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844075028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:34,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:34,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2021-12-14 13:50:34,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288613391] [2021-12-14 13:50:34,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:34,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 13:50:34,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:34,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 13:50:34,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2021-12-14 13:50:34,457 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:34,779 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-12-14 13:50:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-14 13:50:34,780 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-14 13:50:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:34,780 INFO L225 Difference]: With dead ends: 112 [2021-12-14 13:50:34,780 INFO L226 Difference]: Without dead ends: 110 [2021-12-14 13:50:34,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2021-12-14 13:50:34,781 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 93 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:34,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 27 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-14 13:50:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-12-14 13:50:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-12-14 13:50:34,789 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2021-12-14 13:50:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:34,789 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-12-14 13:50:34,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-12-14 13:50:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 13:50:34,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:34,790 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:34,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:35,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-14 13:50:35,007 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:35,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2021-12-14 13:50:35,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:35,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638166722] [2021-12-14 13:50:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:35,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:35,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:35,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638166722] [2021-12-14 13:50:35,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638166722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:35,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858329886] [2021-12-14 13:50:35,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:35,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:35,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:35,517 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:35,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-14 13:50:35,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-12-14 13:50:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 13:50:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:35,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:35,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858329886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:35,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:35,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 54 [2021-12-14 13:50:35,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942387125] [2021-12-14 13:50:35,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:35,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-14 13:50:35,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-14 13:50:35,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 13:50:35,812 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:36,172 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-12-14 13:50:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-14 13:50:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-14 13:50:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:36,174 INFO L225 Difference]: With dead ends: 184 [2021-12-14 13:50:36,174 INFO L226 Difference]: Without dead ends: 105 [2021-12-14 13:50:36,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1484, Invalid=4836, Unknown=0, NotChecked=0, Total=6320 [2021-12-14 13:50:36,175 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:36,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 175 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-14 13:50:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-14 13:50:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-12-14 13:50:36,183 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2021-12-14 13:50:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:36,183 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-12-14 13:50:36,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-12-14 13:50:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 13:50:36,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:36,184 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:36,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:36,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-14 13:50:36,403 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2021-12-14 13:50:36,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651815233] [2021-12-14 13:50:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:36,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:36,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:36,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651815233] [2021-12-14 13:50:36,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651815233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:36,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257322589] [2021-12-14 13:50:36,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:36,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:36,679 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:36,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-14 13:50:36,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-14 13:50:36,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:36,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-14 13:50:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:36,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:37,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257322589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:37,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:37,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2021-12-14 13:50:37,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089668089] [2021-12-14 13:50:37,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:37,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 13:50:37,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 13:50:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2021-12-14 13:50:37,112 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:37,462 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2021-12-14 13:50:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-14 13:50:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-14 13:50:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:37,463 INFO L225 Difference]: With dead ends: 116 [2021-12-14 13:50:37,463 INFO L226 Difference]: Without dead ends: 114 [2021-12-14 13:50:37,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 13:50:37,464 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:37,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 35 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-14 13:50:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-12-14 13:50:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-12-14 13:50:37,472 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2021-12-14 13:50:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:37,472 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-12-14 13:50:37,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-12-14 13:50:37,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-14 13:50:37,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:37,473 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:37,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:37,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-14 13:50:37,676 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:37,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2021-12-14 13:50:37,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:37,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346515280] [2021-12-14 13:50:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:37,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:38,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346515280] [2021-12-14 13:50:38,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346515280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316337672] [2021-12-14 13:50:38,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:50:38,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:38,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:38,455 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:38,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-14 13:50:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-14 13:50:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:38,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:38,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316337672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:38,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:38,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 56 [2021-12-14 13:50:38,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277687887] [2021-12-14 13:50:38,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:38,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-14 13:50:38,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-14 13:50:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2021-12-14 13:50:38,878 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:39,366 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-12-14 13:50:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-14 13:50:39,367 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-14 13:50:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:39,367 INFO L225 Difference]: With dead ends: 191 [2021-12-14 13:50:39,367 INFO L226 Difference]: Without dead ends: 109 [2021-12-14 13:50:39,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1595, Invalid=5211, Unknown=0, NotChecked=0, Total=6806 [2021-12-14 13:50:39,369 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:39,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 238 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-14 13:50:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-12-14 13:50:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-12-14 13:50:39,377 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2021-12-14 13:50:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:39,377 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-12-14 13:50:39,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-12-14 13:50:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-14 13:50:39,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:39,378 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:39,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-14 13:50:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-14 13:50:39,594 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2021-12-14 13:50:39,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:39,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245243739] [2021-12-14 13:50:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:39,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:39,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245243739] [2021-12-14 13:50:39,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245243739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306517795] [2021-12-14 13:50:39,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:50:39,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:39,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:39,952 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:39,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-14 13:50:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:50:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-14 13:50:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:40,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:40,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306517795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:40,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:40,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2021-12-14 13:50:40,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424139637] [2021-12-14 13:50:40,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:40,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 13:50:40,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 13:50:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2021-12-14 13:50:40,337 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:40,610 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2021-12-14 13:50:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-14 13:50:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-14 13:50:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:40,611 INFO L225 Difference]: With dead ends: 120 [2021-12-14 13:50:40,611 INFO L226 Difference]: Without dead ends: 118 [2021-12-14 13:50:40,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2021-12-14 13:50:40,613 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:40,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 29 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-14 13:50:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-12-14 13:50:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-12-14 13:50:40,622 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2021-12-14 13:50:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:40,622 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-12-14 13:50:40,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-12-14 13:50:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 13:50:40,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:40,623 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:40,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:40,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:40,843 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2021-12-14 13:50:40,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:40,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643311541] [2021-12-14 13:50:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:40,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:41,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:41,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643311541] [2021-12-14 13:50:41,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643311541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634710222] [2021-12-14 13:50:41,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:50:41,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:41,480 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:41,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-14 13:50:41,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-14 13:50:41,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:41,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-14 13:50:41,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:41,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:41,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634710222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:41,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:41,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 58 [2021-12-14 13:50:41,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051279130] [2021-12-14 13:50:41,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:41,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-14 13:50:41,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-14 13:50:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 13:50:41,959 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:42,593 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2021-12-14 13:50:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-14 13:50:42,593 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-14 13:50:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:42,594 INFO L225 Difference]: With dead ends: 198 [2021-12-14 13:50:42,594 INFO L226 Difference]: Without dead ends: 113 [2021-12-14 13:50:42,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1710, Invalid=5600, Unknown=0, NotChecked=0, Total=7310 [2021-12-14 13:50:42,595 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:42,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 208 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-14 13:50:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-12-14 13:50:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-12-14 13:50:42,602 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2021-12-14 13:50:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:42,602 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-12-14 13:50:42,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-12-14 13:50:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 13:50:42,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:42,603 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:42,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:42,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-14 13:50:42,803 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2021-12-14 13:50:42,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:42,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499058699] [2021-12-14 13:50:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:42,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:43,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499058699] [2021-12-14 13:50:43,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499058699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180361748] [2021-12-14 13:50:43,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:50:43,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:43,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:43,153 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:43,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-14 13:50:43,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:43,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-14 13:50:43,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:43,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:43,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180361748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:43,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:43,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2021-12-14 13:50:43,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50613935] [2021-12-14 13:50:43,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:43,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 13:50:43,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 13:50:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 13:50:43,614 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:43,997 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2021-12-14 13:50:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-14 13:50:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 13:50:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:43,998 INFO L225 Difference]: With dead ends: 124 [2021-12-14 13:50:43,998 INFO L226 Difference]: Without dead ends: 122 [2021-12-14 13:50:43,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2021-12-14 13:50:43,998 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:43,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 27 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-14 13:50:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2021-12-14 13:50:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-12-14 13:50:44,007 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2021-12-14 13:50:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:44,007 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-12-14 13:50:44,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-12-14 13:50:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-14 13:50:44,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:44,008 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:44,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:44,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:44,225 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:44,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:44,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2021-12-14 13:50:44,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:44,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533015055] [2021-12-14 13:50:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:44,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:45,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:45,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533015055] [2021-12-14 13:50:45,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533015055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:45,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920152179] [2021-12-14 13:50:45,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:45,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:45,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:45,066 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:45,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-14 13:50:45,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-12-14 13:50:45,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:45,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-14 13:50:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:45,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:45,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920152179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:45,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:45,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 60 [2021-12-14 13:50:45,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863324910] [2021-12-14 13:50:45,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:45,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-14 13:50:45,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-14 13:50:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2021-12-14 13:50:45,507 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:46,169 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2021-12-14 13:50:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-14 13:50:46,169 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-14 13:50:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:46,170 INFO L225 Difference]: With dead ends: 205 [2021-12-14 13:50:46,170 INFO L226 Difference]: Without dead ends: 117 [2021-12-14 13:50:46,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1829, Invalid=6003, Unknown=0, NotChecked=0, Total=7832 [2021-12-14 13:50:46,171 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:46,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 234 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-14 13:50:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-14 13:50:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-12-14 13:50:46,180 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2021-12-14 13:50:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:46,180 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-12-14 13:50:46,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-12-14 13:50:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 13:50:46,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:46,181 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:46,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-14 13:50:46,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:46,398 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2021-12-14 13:50:46,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:46,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758444410] [2021-12-14 13:50:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:46,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:46,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:46,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758444410] [2021-12-14 13:50:46,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758444410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:46,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145559504] [2021-12-14 13:50:46,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:46,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:46,808 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:46,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-14 13:50:46,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-12-14 13:50:46,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-14 13:50:46,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:47,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:47,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145559504] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:47,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:47,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2021-12-14 13:50:47,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980775983] [2021-12-14 13:50:47,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:47,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 13:50:47,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 13:50:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 13:50:47,299 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:47,683 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-12-14 13:50:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-14 13:50:47,683 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-14 13:50:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:47,684 INFO L225 Difference]: With dead ends: 128 [2021-12-14 13:50:47,684 INFO L226 Difference]: Without dead ends: 126 [2021-12-14 13:50:47,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2021-12-14 13:50:47,684 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:47,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 26 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-14 13:50:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2021-12-14 13:50:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-12-14 13:50:47,694 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2021-12-14 13:50:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:47,694 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-12-14 13:50:47,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-12-14 13:50:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-14 13:50:47,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:47,695 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:47,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-14 13:50:47,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:47,898 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:47,898 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2021-12-14 13:50:47,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:47,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893892427] [2021-12-14 13:50:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:47,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:48,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:48,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893892427] [2021-12-14 13:50:48,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893892427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:48,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228575502] [2021-12-14 13:50:48,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:50:48,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:48,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:48,800 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:48,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-14 13:50:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:48,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-14 13:50:48,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:49,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:49,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228575502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:49,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:49,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 62 [2021-12-14 13:50:49,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318739132] [2021-12-14 13:50:49,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:49,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-14 13:50:49,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-14 13:50:49,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2021-12-14 13:50:49,241 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:49,945 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-12-14 13:50:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-14 13:50:49,945 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-14 13:50:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:49,946 INFO L225 Difference]: With dead ends: 212 [2021-12-14 13:50:49,946 INFO L226 Difference]: Without dead ends: 121 [2021-12-14 13:50:49,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1952, Invalid=6420, Unknown=0, NotChecked=0, Total=8372 [2021-12-14 13:50:49,958 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:49,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 258 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:50:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-14 13:50:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-14 13:50:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-12-14 13:50:49,968 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2021-12-14 13:50:49,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:49,968 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-12-14 13:50:49,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-12-14 13:50:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 13:50:49,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:49,969 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:49,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:50,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:50,186 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2021-12-14 13:50:50,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:50,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246825915] [2021-12-14 13:50:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:50,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:50,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246825915] [2021-12-14 13:50:50,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246825915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993848330] [2021-12-14 13:50:50,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:50:50,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:50,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:50,574 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:50,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-14 13:50:50,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:50:50,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:50,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-14 13:50:50,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:50,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:51,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993848330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:51,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:51,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2021-12-14 13:50:51,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983068525] [2021-12-14 13:50:51,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:51,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 13:50:51,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 13:50:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 13:50:51,095 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:51,551 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2021-12-14 13:50:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-14 13:50:51,552 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-14 13:50:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:51,552 INFO L225 Difference]: With dead ends: 132 [2021-12-14 13:50:51,553 INFO L226 Difference]: Without dead ends: 130 [2021-12-14 13:50:51,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2021-12-14 13:50:51,554 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 101 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:51,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 30 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:50:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-14 13:50:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-12-14 13:50:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-12-14 13:50:51,574 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2021-12-14 13:50:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:51,574 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-12-14 13:50:51,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-12-14 13:50:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-14 13:50:51,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:51,575 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:51,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-14 13:50:51,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-14 13:50:51,792 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:51,792 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2021-12-14 13:50:51,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:51,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334990506] [2021-12-14 13:50:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:51,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:52,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:52,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334990506] [2021-12-14 13:50:52,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334990506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:52,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039316332] [2021-12-14 13:50:52,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:50:52,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:52,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:52,749 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:52,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-14 13:50:52,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-12-14 13:50:52,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:52,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-14 13:50:52,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:53,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:53,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039316332] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:53,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:53,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 64 [2021-12-14 13:50:53,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639306433] [2021-12-14 13:50:53,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:53,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-14 13:50:53,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-14 13:50:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2021-12-14 13:50:53,225 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:54,006 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-12-14 13:50:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-14 13:50:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-12-14 13:50:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:54,007 INFO L225 Difference]: With dead ends: 219 [2021-12-14 13:50:54,007 INFO L226 Difference]: Without dead ends: 125 [2021-12-14 13:50:54,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2079, Invalid=6851, Unknown=0, NotChecked=0, Total=8930 [2021-12-14 13:50:54,008 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:54,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 291 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:50:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-14 13:50:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-14 13:50:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-12-14 13:50:54,017 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2021-12-14 13:50:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:54,018 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-12-14 13:50:54,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-12-14 13:50:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 13:50:54,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:54,018 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:54,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-14 13:50:54,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-14 13:50:54,235 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2021-12-14 13:50:54,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:54,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847395708] [2021-12-14 13:50:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:54,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:54,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847395708] [2021-12-14 13:50:54,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847395708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943118151] [2021-12-14 13:50:54,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:50:54,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:54,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:54,647 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:54,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-14 13:50:54,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:50:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-14 13:50:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:54,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:55,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943118151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:55,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:55,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2021-12-14 13:50:55,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803893576] [2021-12-14 13:50:55,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:55,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 13:50:55,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 13:50:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 13:50:55,177 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:55,631 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2021-12-14 13:50:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-14 13:50:55,631 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-14 13:50:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:55,632 INFO L225 Difference]: With dead ends: 136 [2021-12-14 13:50:55,632 INFO L226 Difference]: Without dead ends: 134 [2021-12-14 13:50:55,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2021-12-14 13:50:55,633 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:55,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 28 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:50:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-14 13:50:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-12-14 13:50:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2021-12-14 13:50:55,645 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2021-12-14 13:50:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:55,646 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2021-12-14 13:50:55,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2021-12-14 13:50:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-14 13:50:55,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:55,647 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:55,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:55,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-14 13:50:55,863 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2021-12-14 13:50:55,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:55,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557698172] [2021-12-14 13:50:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:55,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:56,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:56,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557698172] [2021-12-14 13:50:56,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557698172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:56,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441426146] [2021-12-14 13:50:56,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:50:56,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:56,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:56,639 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:56,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-14 13:50:56,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-14 13:50:56,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:56,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-14 13:50:56,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:56,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:57,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441426146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:57,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:57,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 66 [2021-12-14 13:50:57,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288109369] [2021-12-14 13:50:57,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:57,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-14 13:50:57,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:57,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-14 13:50:57,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2021-12-14 13:50:57,019 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:57,553 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2021-12-14 13:50:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-14 13:50:57,553 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-14 13:50:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:57,554 INFO L225 Difference]: With dead ends: 226 [2021-12-14 13:50:57,554 INFO L226 Difference]: Without dead ends: 129 [2021-12-14 13:50:57,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2210, Invalid=7296, Unknown=0, NotChecked=0, Total=9506 [2021-12-14 13:50:57,555 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:57,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 292 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:50:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-14 13:50:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-12-14 13:50:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-12-14 13:50:57,576 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2021-12-14 13:50:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:57,577 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-12-14 13:50:57,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-12-14 13:50:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 13:50:57,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:57,578 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:57,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:57,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:57,787 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2021-12-14 13:50:57,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:57,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989452269] [2021-12-14 13:50:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:57,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:50:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:58,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:50:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989452269] [2021-12-14 13:50:58,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989452269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:50:58,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323972131] [2021-12-14 13:50:58,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:50:58,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:58,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:50:58,119 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:50:58,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-14 13:50:58,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-12-14 13:50:58,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:50:58,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-14 13:50:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:50:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:58,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:50:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:50:58,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323972131] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:50:58,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:50:58,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2021-12-14 13:50:58,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971842266] [2021-12-14 13:50:58,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:50:58,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 13:50:58,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:50:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 13:50:58,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 13:50:58,595 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:50:59,061 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-12-14 13:50:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-14 13:50:59,061 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-14 13:50:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:50:59,062 INFO L225 Difference]: With dead ends: 140 [2021-12-14 13:50:59,062 INFO L226 Difference]: Without dead ends: 138 [2021-12-14 13:50:59,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2021-12-14 13:50:59,062 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:50:59,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 23 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:50:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-14 13:50:59,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-12-14 13:50:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2021-12-14 13:50:59,073 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2021-12-14 13:50:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:50:59,074 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2021-12-14 13:50:59,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:50:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2021-12-14 13:50:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-14 13:50:59,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:50:59,075 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-12-14 13:50:59,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-14 13:50:59,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:50:59,280 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:50:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:50:59,280 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2021-12-14 13:50:59,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:50:59,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544407242] [2021-12-14 13:50:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:50:59,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:50:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:00,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:00,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544407242] [2021-12-14 13:51:00,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544407242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:00,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278875123] [2021-12-14 13:51:00,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:51:00,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:00,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:00,365 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:00,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-14 13:51:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-14 13:51:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:00,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:00,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278875123] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:00,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:00,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 68 [2021-12-14 13:51:00,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672515029] [2021-12-14 13:51:00,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:00,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-14 13:51:00,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:00,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-14 13:51:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2021-12-14 13:51:00,891 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:01,728 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2021-12-14 13:51:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-14 13:51:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-14 13:51:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:01,729 INFO L225 Difference]: With dead ends: 233 [2021-12-14 13:51:01,729 INFO L226 Difference]: Without dead ends: 133 [2021-12-14 13:51:01,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2345, Invalid=7755, Unknown=0, NotChecked=0, Total=10100 [2021-12-14 13:51:01,730 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:01,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:51:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-14 13:51:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-14 13:51:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-12-14 13:51:01,763 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2021-12-14 13:51:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:01,764 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-12-14 13:51:01,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-12-14 13:51:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-14 13:51:01,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:01,765 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:01,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:01,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:01,982 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2021-12-14 13:51:01,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:01,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809625527] [2021-12-14 13:51:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:01,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:02,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:02,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809625527] [2021-12-14 13:51:02,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809625527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:02,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138809935] [2021-12-14 13:51:02,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:51:02,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:02,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:02,473 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:02,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-14 13:51:02,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:51:02,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:02,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-14 13:51:02,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:02,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:02,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138809935] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:02,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:02,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2021-12-14 13:51:02,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484854572] [2021-12-14 13:51:02,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:02,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-14 13:51:02,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-14 13:51:02,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 13:51:02,953 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:03,313 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2021-12-14 13:51:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-14 13:51:03,313 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-14 13:51:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:03,314 INFO L225 Difference]: With dead ends: 144 [2021-12-14 13:51:03,314 INFO L226 Difference]: Without dead ends: 142 [2021-12-14 13:51:03,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2021-12-14 13:51:03,315 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 111 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:03,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 32 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:51:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-14 13:51:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2021-12-14 13:51:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-12-14 13:51:03,327 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2021-12-14 13:51:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:03,327 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-12-14 13:51:03,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-12-14 13:51:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 13:51:03,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:03,328 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:03,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:03,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-14 13:51:03,544 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2021-12-14 13:51:03,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:03,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274469911] [2021-12-14 13:51:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:03,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:04,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:04,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274469911] [2021-12-14 13:51:04,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274469911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:04,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732522307] [2021-12-14 13:51:04,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:51:04,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:04,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:04,239 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:04,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-14 13:51:04,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-12-14 13:51:04,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-14 13:51:04,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:04,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:04,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732522307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:04,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:04,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 70 [2021-12-14 13:51:04,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409686625] [2021-12-14 13:51:04,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:04,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-14 13:51:04,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-14 13:51:04,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2021-12-14 13:51:04,597 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:05,158 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2021-12-14 13:51:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-14 13:51:05,158 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-14 13:51:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:05,159 INFO L225 Difference]: With dead ends: 240 [2021-12-14 13:51:05,159 INFO L226 Difference]: Without dead ends: 137 [2021-12-14 13:51:05,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2484, Invalid=8228, Unknown=0, NotChecked=0, Total=10712 [2021-12-14 13:51:05,160 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:05,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 253 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:51:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-14 13:51:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-14 13:51:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-12-14 13:51:05,173 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2021-12-14 13:51:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:05,173 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-12-14 13:51:05,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-12-14 13:51:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-14 13:51:05,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:05,174 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:05,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:05,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:05,391 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2021-12-14 13:51:05,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:05,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192449935] [2021-12-14 13:51:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:05,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:05,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:05,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192449935] [2021-12-14 13:51:05,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192449935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:05,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023430204] [2021-12-14 13:51:05,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:51:05,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:05,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:05,899 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:05,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-14 13:51:05,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:51:05,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:05,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-14 13:51:05,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:06,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:06,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023430204] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:06,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:06,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2021-12-14 13:51:06,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567916031] [2021-12-14 13:51:06,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:06,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-14 13:51:06,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:06,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-14 13:51:06,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 13:51:06,538 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:07,079 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-12-14 13:51:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-14 13:51:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-14 13:51:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:07,080 INFO L225 Difference]: With dead ends: 148 [2021-12-14 13:51:07,080 INFO L226 Difference]: Without dead ends: 146 [2021-12-14 13:51:07,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2021-12-14 13:51:07,081 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:07,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 33 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:51:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-14 13:51:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-12-14 13:51:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-12-14 13:51:07,094 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2021-12-14 13:51:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:07,094 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-12-14 13:51:07,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-12-14 13:51:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-14 13:51:07,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:07,095 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:07,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:07,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-14 13:51:07,313 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2021-12-14 13:51:07,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:07,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367210431] [2021-12-14 13:51:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:07,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:08,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367210431] [2021-12-14 13:51:08,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367210431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097254002] [2021-12-14 13:51:08,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:51:08,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:08,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:08,530 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:08,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-14 13:51:08,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-12-14 13:51:08,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-14 13:51:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:08,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:09,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097254002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:09,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:09,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 72 [2021-12-14 13:51:09,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069860829] [2021-12-14 13:51:09,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:09,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-14 13:51:09,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-14 13:51:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2021-12-14 13:51:09,068 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:09,659 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2021-12-14 13:51:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-14 13:51:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-14 13:51:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:09,660 INFO L225 Difference]: With dead ends: 247 [2021-12-14 13:51:09,660 INFO L226 Difference]: Without dead ends: 141 [2021-12-14 13:51:09,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2627, Invalid=8715, Unknown=0, NotChecked=0, Total=11342 [2021-12-14 13:51:09,661 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:09,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 227 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:51:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-14 13:51:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-14 13:51:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-12-14 13:51:09,673 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2021-12-14 13:51:09,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:09,674 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-12-14 13:51:09,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:09,674 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-12-14 13:51:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-14 13:51:09,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:09,674 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:09,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:09,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-14 13:51:09,892 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:09,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2021-12-14 13:51:09,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:09,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972341400] [2021-12-14 13:51:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:09,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:10,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:10,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972341400] [2021-12-14 13:51:10,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972341400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:10,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99477528] [2021-12-14 13:51:10,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:51:10,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:10,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:10,357 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:10,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-14 13:51:10,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-12-14 13:51:10,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:10,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-14 13:51:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:10,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:10,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99477528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:10,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:10,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2021-12-14 13:51:10,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836434936] [2021-12-14 13:51:10,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:10,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-14 13:51:10,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-14 13:51:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 13:51:10,834 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:11,354 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2021-12-14 13:51:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-14 13:51:11,355 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-14 13:51:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:11,355 INFO L225 Difference]: With dead ends: 152 [2021-12-14 13:51:11,355 INFO L226 Difference]: Without dead ends: 150 [2021-12-14 13:51:11,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2021-12-14 13:51:11,356 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:11,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 36 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:51:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-14 13:51:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2021-12-14 13:51:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-12-14 13:51:11,369 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2021-12-14 13:51:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:11,369 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-12-14 13:51:11,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:51:11,369 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-12-14 13:51:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-14 13:51:11,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:11,370 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:11,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:11,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-14 13:51:11,587 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2021-12-14 13:51:11,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:11,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140817313] [2021-12-14 13:51:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:11,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:12,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140817313] [2021-12-14 13:51:12,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140817313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:12,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180787871] [2021-12-14 13:51:12,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:51:12,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:12,347 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:12,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-14 13:51:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-14 13:51:12,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:12,559 INFO L328 TraceCheckSpWp]: Computing backward predicates...