./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/mcmillan2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-lit/mcmillan2006.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 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:41:32,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:41:32,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:41:32,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:41:32,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:41:32,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:41:32,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:41:32,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:41:32,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:41:32,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:41:32,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:41:32,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:41:32,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:41:32,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:41:32,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:41:32,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:41:32,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:41:32,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:41:32,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:41:32,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:41:32,684 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:41:32,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:41:32,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:41:32,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:41:32,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:41:32,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:41:32,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:41:32,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:41:32,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:41:32,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:41:32,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:41:32,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:41:32,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:41:32,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:41:32,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:41:32,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:41:32,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:41:32,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:41:32,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:41:32,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:41:32,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:41:32,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:41:32,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:41:32,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:41:32,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:41:32,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:41:32,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:41:32,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:41:32,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:41:32,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:41:32,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:41:32,728 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:41:32,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:41:32,728 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:41:32,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:41:32,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:41:32,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:41:32,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:41:32,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:41:32,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:41:32,729 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:41:32,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:41:32,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:41:32,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:41:32,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:41:32,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:41:32,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:41:32,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:41:32,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:41:32,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:41:32,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:41:32,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:41:32,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:41:32,732 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:41:32,732 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:41:32,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:41:32,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be [2022-07-21 02:41:32,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:41:33,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:41:33,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:41:33,016 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:41:33,016 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:41:33,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/mcmillan2006.i [2022-07-21 02:41:33,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145df4223/9e0f7def399f406ba5a999137274e497/FLAGf74bd17ae [2022-07-21 02:41:33,423 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:41:33,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/mcmillan2006.i [2022-07-21 02:41:33,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145df4223/9e0f7def399f406ba5a999137274e497/FLAGf74bd17ae [2022-07-21 02:41:33,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145df4223/9e0f7def399f406ba5a999137274e497 [2022-07-21 02:41:33,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:41:33,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:41:33,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:41:33,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:41:33,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:41:33,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be53796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33, skipping insertion in model container [2022-07-21 02:41:33,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:41:33,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:41:33,559 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-lit/mcmillan2006.i[1009,1022] [2022-07-21 02:41:33,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:41:33,571 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:41:33,579 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-lit/mcmillan2006.i[1009,1022] [2022-07-21 02:41:33,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:41:33,594 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:41:33,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33 WrapperNode [2022-07-21 02:41:33,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:41:33,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:41:33,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:41:33,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:41:33,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,618 INFO L137 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-07-21 02:41:33,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:41:33,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:41:33,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:41:33,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:41:33,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:41:33,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:41:33,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:41:33,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:41:33,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (1/1) ... [2022-07-21 02:41:33,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:41:33,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:33,712 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) [2022-07-21 02:41:33,744 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 [2022-07-21 02:41:33,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:41:33,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:41:33,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 02:41:33,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 02:41:33,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:41:33,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:41:33,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 02:41:33,804 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:41:33,805 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:41:33,920 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:41:33,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:41:33,923 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 02:41:33,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:41:33 BoogieIcfgContainer [2022-07-21 02:41:33,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:41:33,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:41:33,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:41:33,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:41:33,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:41:33" (1/3) ... [2022-07-21 02:41:33,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acee654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:41:33, skipping insertion in model container [2022-07-21 02:41:33,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:33" (2/3) ... [2022-07-21 02:41:33,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acee654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:41:33, skipping insertion in model container [2022-07-21 02:41:33,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:41:33" (3/3) ... [2022-07-21 02:41:33,937 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2022-07-21 02:41:33,951 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:41:33,967 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:41:34,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:41:34,018 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2331607e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@48283e17 [2022-07-21 02:41:34,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:41:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) [2022-07-21 02:41:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 02:41:34,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:34,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:34,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash 186158361, now seen corresponding path program 1 times [2022-07-21 02:41:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:34,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954371551] [2022-07-21 02:41:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:34,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:34,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954371551] [2022-07-21 02:41:34,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954371551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:41:34,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:41:34,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:41:34,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393735848] [2022-07-21 02:41:34,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:41:34,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:41:34,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:34,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:41:34,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:41:34,175 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:34,185 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-07-21 02:41:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:41:34,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 02:41:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:34,192 INFO L225 Difference]: With dead ends: 27 [2022-07-21 02:41:34,192 INFO L226 Difference]: Without dead ends: 12 [2022-07-21 02:41:34,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:41:34,199 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:34,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:41:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-21 02:41:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-21 02:41:34,232 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) [2022-07-21 02:41:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-21 02:41:34,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-07-21 02:41:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:34,236 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-21 02:41:34,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-21 02:41:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 02:41:34,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:34,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:34,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:41:34,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:34,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:34,240 INFO L85 PathProgramCache]: Analyzing trace with hash 180617235, now seen corresponding path program 1 times [2022-07-21 02:41:34,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:34,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845932565] [2022-07-21 02:41:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:34,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845932565] [2022-07-21 02:41:34,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845932565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:41:34,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:41:34,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 02:41:34,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076787385] [2022-07-21 02:41:34,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:41:34,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 02:41:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 02:41:34,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 02:41:34,343 INFO L87 Difference]: Start difference. First operand 12 states and 13 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) [2022-07-21 02:41:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:34,381 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-07-21 02:41:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:41:34,382 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 [2022-07-21 02:41:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:34,382 INFO L225 Difference]: With dead ends: 22 [2022-07-21 02:41:34,383 INFO L226 Difference]: Without dead ends: 14 [2022-07-21 02:41:34,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:41:34,387 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:34,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:41:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-21 02:41:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-07-21 02:41:34,393 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) [2022-07-21 02:41:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-07-21 02:41:34,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-07-21 02:41:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:34,395 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-07-21 02:41:34,395 INFO L496 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) [2022-07-21 02:41:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-07-21 02:41:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 02:41:34,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:34,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:34,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:41:34,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash -875113359, now seen corresponding path program 1 times [2022-07-21 02:41:34,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:34,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52455788] [2022-07-21 02:41:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:34,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:34,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:34,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52455788] [2022-07-21 02:41:34,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52455788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:34,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470596026] [2022-07-21 02:41:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:34,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:34,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:34,582 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) [2022-07-21 02:41:34,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:41:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 02:41:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:34,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-07-21 02:41:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:34,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:34,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-21 02:41:34,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-07-21 02:41:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:34,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470596026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:34,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:34,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-07-21 02:41:34,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492071596] [2022-07-21 02:41:34,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:34,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 02:41:34,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 02:41:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:41:34,838 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2022-07-21 02:41:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:34,912 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-07-21 02:41:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 02:41:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 10 [2022-07-21 02:41:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:34,913 INFO L225 Difference]: With dead ends: 21 [2022-07-21 02:41:34,913 INFO L226 Difference]: Without dead ends: 19 [2022-07-21 02:41:34,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:41:34,914 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:34,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:41:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-21 02:41:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-07-21 02:41:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2022-07-21 02:41:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-07-21 02:41:34,918 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-07-21 02:41:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:34,918 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-07-21 02:41:34,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2022-07-21 02:41:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-07-21 02:41:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 02:41:34,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:34,919 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:34,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:35,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:35,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:35,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1418361721, now seen corresponding path program 1 times [2022-07-21 02:41:35,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:35,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63998853] [2022-07-21 02:41:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:35,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:35,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:35,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63998853] [2022-07-21 02:41:35,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63998853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:35,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725342888] [2022-07-21 02:41:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:35,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:35,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:35,197 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) [2022-07-21 02:41:35,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:41:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 02:41:35,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:35,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:35,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725342888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:35,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:35,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-21 02:41:35,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323761643] [2022-07-21 02:41:35,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:35,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 02:41:35,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 02:41:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:41:35,301 INFO L87 Difference]: Start difference. First operand 15 states and 16 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) [2022-07-21 02:41:35,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:35,345 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-07-21 02:41:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:41:35,345 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 14 [2022-07-21 02:41:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:35,346 INFO L225 Difference]: With dead ends: 30 [2022-07-21 02:41:35,346 INFO L226 Difference]: Without dead ends: 18 [2022-07-21 02:41:35,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:41:35,347 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:35,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:41:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-21 02:41:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-07-21 02:41:35,350 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) [2022-07-21 02:41:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-07-21 02:41:35,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-07-21 02:41:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:35,351 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-07-21 02:41:35,351 INFO L496 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) [2022-07-21 02:41:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-07-21 02:41:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 02:41:35,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:35,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:35,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:35,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 02:41:35,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash -324855195, now seen corresponding path program 2 times [2022-07-21 02:41:35,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:35,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425612556] [2022-07-21 02:41:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:35,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:35,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:35,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425612556] [2022-07-21 02:41:35,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425612556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:35,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668637174] [2022-07-21 02:41:35,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:41:35,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:35,655 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) [2022-07-21 02:41:35,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:41:35,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:35,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:35,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 02:41:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:35,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:35,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:35,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:41:35,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:41:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:35,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668637174] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:35,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:35,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-21 02:41:35,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583890234] [2022-07-21 02:41:35,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:35,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 02:41:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:35,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 02:41:35,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:41:35,856 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:35,945 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-07-21 02:41:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:41:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 02:41:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:35,946 INFO L225 Difference]: With dead ends: 27 [2022-07-21 02:41:35,946 INFO L226 Difference]: Without dead ends: 25 [2022-07-21 02:41:35,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:41:35,947 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:35,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 51 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:41:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-21 02:41:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-07-21 02:41:35,950 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) [2022-07-21 02:41:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-21 02:41:35,951 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2022-07-21 02:41:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:35,951 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-21 02:41:35,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-21 02:41:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 02:41:35,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:35,952 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:35,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:36,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:36,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1610985595, now seen corresponding path program 3 times [2022-07-21 02:41:36,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:36,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173537014] [2022-07-21 02:41:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:36,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:36,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:36,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173537014] [2022-07-21 02:41:36,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173537014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:36,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028066174] [2022-07-21 02:41:36,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:36,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:36,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:36,240 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) [2022-07-21 02:41:36,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:41:36,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 02:41:36,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 02:41:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:36,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:36,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028066174] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:36,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:36,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-21 02:41:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634075130] [2022-07-21 02:41:36,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:36,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:41:36,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:36,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:41:36,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:41:36,416 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2022-07-21 02:41:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:36,476 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-21 02:41:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 02:41:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 02:41:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:36,477 INFO L225 Difference]: With dead ends: 40 [2022-07-21 02:41:36,477 INFO L226 Difference]: Without dead ends: 24 [2022-07-21 02:41:36,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:41:36,478 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:36,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:41:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-21 02:41:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-21 02:41:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 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) [2022-07-21 02:41:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-07-21 02:41:36,481 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2022-07-21 02:41:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:36,482 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-07-21 02:41:36,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2022-07-21 02:41:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-07-21 02:41:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 02:41:36,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:36,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:36,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:36,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:36,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash 731310041, now seen corresponding path program 4 times [2022-07-21 02:41:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:36,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830064361] [2022-07-21 02:41:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:36,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:36,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830064361] [2022-07-21 02:41:36,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830064361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430907817] [2022-07-21 02:41:36,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:41:36,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:36,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:36,800 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) [2022-07-21 02:41:36,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:41:36,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:41:36,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:36,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 02:41:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:36,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:37,089 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 02:41:37,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-07-21 02:41:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:37,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:37,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-21 02:41:37,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-21 02:41:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:37,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430907817] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:37,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:37,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-07-21 02:41:37,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819451578] [2022-07-21 02:41:37,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:37,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 02:41:37,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 02:41:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-07-21 02:41:37,327 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-07-21 02:41:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:37,516 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-07-21 02:41:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 02:41:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) Word has length 22 [2022-07-21 02:41:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:37,517 INFO L225 Difference]: With dead ends: 41 [2022-07-21 02:41:37,517 INFO L226 Difference]: Without dead ends: 25 [2022-07-21 02:41:37,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 02:41:37,520 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:37,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2022-07-21 02:41:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-21 02:41:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-21 02:41:37,528 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) [2022-07-21 02:41:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-07-21 02:41:37,529 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2022-07-21 02:41:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:37,529 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-07-21 02:41:37,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-07-21 02:41:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-07-21 02:41:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 02:41:37,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:37,532 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:37,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:37,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:37,740 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1471659959, now seen corresponding path program 5 times [2022-07-21 02:41:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:37,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950373453] [2022-07-21 02:41:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:37,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950373453] [2022-07-21 02:41:37,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950373453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280013720] [2022-07-21 02:41:37,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:41:37,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:37,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:37,879 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) [2022-07-21 02:41:37,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:41:37,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 02:41:37,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:37,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 02:41:37,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:37,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:37,979 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-21 02:41:37,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 02:41:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:38,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:38,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:41:38,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:41:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280013720] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:38,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:38,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2022-07-21 02:41:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405917179] [2022-07-21 02:41:38,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:38,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 02:41:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 02:41:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:41:38,131 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2022-07-21 02:41:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:38,283 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-07-21 02:41:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 02:41:38,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 24 [2022-07-21 02:41:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:38,284 INFO L225 Difference]: With dead ends: 49 [2022-07-21 02:41:38,284 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 02:41:38,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-07-21 02:41:38,286 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:38,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 143 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-07-21 02:41:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 02:41:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2022-07-21 02:41:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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) [2022-07-21 02:41:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-07-21 02:41:38,302 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2022-07-21 02:41:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:38,302 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-07-21 02:41:38,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2022-07-21 02:41:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-07-21 02:41:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 02:41:38,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:38,303 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:38,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:38,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:38,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash -16639979, now seen corresponding path program 6 times [2022-07-21 02:41:38,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:38,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254702310] [2022-07-21 02:41:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:38,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:38,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254702310] [2022-07-21 02:41:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254702310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102363439] [2022-07-21 02:41:38,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:41:38,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:38,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:38,714 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) [2022-07-21 02:41:38,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 02:41:38,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 02:41:38,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 02:41:38,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:38,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:38,794 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-21 02:41:38,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 02:41:38,818 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-21 02:41:38,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 02:41:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:38,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:41,025 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_119 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_119) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8)) 0)))) is different from false [2022-07-21 02:41:41,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:41:41,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:41:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-07-21 02:41:41,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102363439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:41,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:41,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 24 [2022-07-21 02:41:41,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621637631] [2022-07-21 02:41:41,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:41,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 02:41:41,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 02:41:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=423, Unknown=1, NotChecked=42, Total=552 [2022-07-21 02:41:41,100 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:43,166 WARN L833 $PredicateComparison]: unable to prove that (and (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (< 3 |c_ULTIMATE.start_main_~n~0#1|) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_119 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_119) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8)) 0)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8)) 0)) is different from false [2022-07-21 02:41:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:43,283 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-21 02:41:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 02:41:43,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 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 26 [2022-07-21 02:41:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:43,284 INFO L225 Difference]: With dead ends: 47 [2022-07-21 02:41:43,284 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 02:41:43,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=149, Invalid=787, Unknown=2, NotChecked=118, Total=1056 [2022-07-21 02:41:43,285 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:43,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 85 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 168 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-21 02:41:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 02:41:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2022-07-21 02:41:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-07-21 02:41:43,289 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-07-21 02:41:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:43,289 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-07-21 02:41:43,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-07-21 02:41:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 02:41:43,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:43,290 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:43,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:43,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:43,503 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash 985881805, now seen corresponding path program 7 times [2022-07-21 02:41:43,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:43,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557853590] [2022-07-21 02:41:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:43,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:43,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557853590] [2022-07-21 02:41:43,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557853590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816047800] [2022-07-21 02:41:43,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:41:43,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:43,656 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) [2022-07-21 02:41:43,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 02:41:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:43,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 02:41:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:43,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:43,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:43,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:41:43,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:41:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:43,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816047800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:43,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:43,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-21 02:41:43,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586838221] [2022-07-21 02:41:43,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:43,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 02:41:43,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:43,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 02:41:43,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:41:43,881 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:44,060 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-07-21 02:41:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 02:41:44,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-21 02:41:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:44,061 INFO L225 Difference]: With dead ends: 39 [2022-07-21 02:41:44,061 INFO L226 Difference]: Without dead ends: 37 [2022-07-21 02:41:44,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-07-21 02:41:44,062 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:44,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 124 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-21 02:41:44,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-07-21 02:41:44,066 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) [2022-07-21 02:41:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-21 02:41:44,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-07-21 02:41:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:44,067 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-21 02:41:44,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-21 02:41:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 02:41:44,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:44,068 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:44,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:44,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 02:41:44,285 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1173257955, now seen corresponding path program 8 times [2022-07-21 02:41:44,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:44,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660451148] [2022-07-21 02:41:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:44,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:44,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660451148] [2022-07-21 02:41:44,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660451148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816689969] [2022-07-21 02:41:44,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:41:44,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:44,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:44,356 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) [2022-07-21 02:41:44,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 02:41:44,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:44,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 02:41:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:44,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:44,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816689969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:44,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:44,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-21 02:41:44,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444934146] [2022-07-21 02:41:44,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:44,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 02:41:44,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 02:41:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-21 02:41:44,540 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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) [2022-07-21 02:41:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:44,659 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-07-21 02:41:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 02:41:44,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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) Word has length 32 [2022-07-21 02:41:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:44,660 INFO L225 Difference]: With dead ends: 60 [2022-07-21 02:41:44,660 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 02:41:44,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-07-21 02:41:44,661 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:44,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 02:41:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-07-21 02:41:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2022-07-21 02:41:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-07-21 02:41:44,666 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-07-21 02:41:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:44,666 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-07-21 02:41:44,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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) [2022-07-21 02:41:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-07-21 02:41:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 02:41:44,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:44,667 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:44,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:44,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:44,915 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash -92169919, now seen corresponding path program 9 times [2022-07-21 02:41:44,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:44,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299237791] [2022-07-21 02:41:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:44,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:45,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:45,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299237791] [2022-07-21 02:41:45,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299237791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:45,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134198647] [2022-07-21 02:41:45,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:45,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:45,068 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) [2022-07-21 02:41:45,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 02:41:45,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 02:41:45,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:45,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 02:41:45,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:45,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:45,507 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 02:41:45,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-07-21 02:41:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:45,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:46,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-21 02:41:46,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-21 02:41:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:46,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134198647] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:46,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:46,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 37 [2022-07-21 02:41:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048960348] [2022-07-21 02:41:46,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:46,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 02:41:46,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 02:41:46,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1159, Unknown=1, NotChecked=0, Total=1332 [2022-07-21 02:41:46,160 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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) [2022-07-21 02:41:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:46,618 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-07-21 02:41:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 02:41:46,618 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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) Word has length 34 [2022-07-21 02:41:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:46,619 INFO L225 Difference]: With dead ends: 61 [2022-07-21 02:41:46,619 INFO L226 Difference]: Without dead ends: 37 [2022-07-21 02:41:46,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=2802, Unknown=1, NotChecked=0, Total=3192 [2022-07-21 02:41:46,620 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:46,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 237 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-07-21 02:41:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-21 02:41:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-21 02:41:46,624 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) [2022-07-21 02:41:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-07-21 02:41:46,625 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-07-21 02:41:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:46,625 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-07-21 02:41:46,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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) [2022-07-21 02:41:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-07-21 02:41:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 02:41:46,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:46,626 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:46,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:46,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 02:41:46,842 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:46,843 INFO L85 PathProgramCache]: Analyzing trace with hash -692612065, now seen corresponding path program 10 times [2022-07-21 02:41:46,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:46,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860480642] [2022-07-21 02:41:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:46,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:46,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860480642] [2022-07-21 02:41:46,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860480642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527219841] [2022-07-21 02:41:46,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:41:46,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:46,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:46,990 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) [2022-07-21 02:41:46,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 02:41:47,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:41:47,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 02:41:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:47,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:47,188 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-21 02:41:47,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 02:41:47,660 INFO L356 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2022-07-21 02:41:47,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 26 [2022-07-21 02:41:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:47,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:48,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:41:48,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:41:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:41:48,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527219841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:48,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:48,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 40 [2022-07-21 02:41:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756848291] [2022-07-21 02:41:48,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:48,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 02:41:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 02:41:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 02:41:48,056 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:51,772 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2022-07-21 02:41:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 02:41:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-21 02:41:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:51,787 INFO L225 Difference]: With dead ends: 85 [2022-07-21 02:41:51,787 INFO L226 Difference]: Without dead ends: 83 [2022-07-21 02:41:51,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=536, Invalid=4576, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 02:41:51,788 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:51,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 241 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 208 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-07-21 02:41:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-21 02:41:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2022-07-21 02:41:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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) [2022-07-21 02:41:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-21 02:41:51,802 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 36 [2022-07-21 02:41:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:51,802 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-21 02:41:51,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-21 02:41:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 02:41:51,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:51,803 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:51,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:52,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 02:41:52,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1452500589, now seen corresponding path program 11 times [2022-07-21 02:41:52,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:52,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075878860] [2022-07-21 02:41:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:52,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:52,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075878860] [2022-07-21 02:41:52,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075878860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:52,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479784962] [2022-07-21 02:41:52,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:41:52,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:52,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:52,202 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) [2022-07-21 02:41:52,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 02:41:52,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-21 02:41:52,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 02:41:52,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:52,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:52,361 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-21 02:41:52,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 02:41:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:52,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:52,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:41:52,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:41:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:52,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479784962] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:52,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:52,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 27 [2022-07-21 02:41:52,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970377156] [2022-07-21 02:41:52,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:52,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 02:41:52,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 02:41:52,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-07-21 02:41:52,643 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:52,903 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2022-07-21 02:41:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 02:41:52,903 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-21 02:41:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:52,904 INFO L225 Difference]: With dead ends: 114 [2022-07-21 02:41:52,904 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 02:41:52,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 02:41:52,905 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:52,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 264 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 474 Invalid, 0 Unknown, 2 Unchecked, 0.2s Time] [2022-07-21 02:41:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 02:41:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 63. [2022-07-21 02:41:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 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) [2022-07-21 02:41:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-07-21 02:41:52,917 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 42 [2022-07-21 02:41:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:52,917 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-07-21 02:41:52,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-07-21 02:41:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 02:41:52,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:52,918 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:52,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:53,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 02:41:53,129 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash -396306831, now seen corresponding path program 12 times [2022-07-21 02:41:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:53,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951067860] [2022-07-21 02:41:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:53,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:53,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:53,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951067860] [2022-07-21 02:41:53,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951067860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175918042] [2022-07-21 02:41:53,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:41:53,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:53,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:53,360 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) [2022-07-21 02:41:53,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 02:41:53,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-21 02:41:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 02:41:53,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:53,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:53,474 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-21 02:41:53,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 02:41:53,505 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-21 02:41:53,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 02:41:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 1 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:53,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:53,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:41:53,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:41:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:41:53,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175918042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:53,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:53,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2022-07-21 02:41:53,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728850205] [2022-07-21 02:41:53,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:53,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 02:41:53,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:53,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 02:41:53,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-07-21 02:41:53,813 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:54,495 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2022-07-21 02:41:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 02:41:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2022-07-21 02:41:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:54,496 INFO L225 Difference]: With dead ends: 118 [2022-07-21 02:41:54,496 INFO L226 Difference]: Without dead ends: 116 [2022-07-21 02:41:54,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=389, Invalid=2691, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 02:41:54,497 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:54,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 451 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:41:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-21 02:41:54,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 60. [2022-07-21 02:41:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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) [2022-07-21 02:41:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-21 02:41:54,516 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 44 [2022-07-21 02:41:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:54,516 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-21 02:41:54,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-21 02:41:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:41:54,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:54,517 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:54,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:54,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 02:41:54,735 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1870665559, now seen corresponding path program 13 times [2022-07-21 02:41:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:54,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655399397] [2022-07-21 02:41:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:54,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:54,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655399397] [2022-07-21 02:41:54,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655399397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:54,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653933140] [2022-07-21 02:41:54,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:41:54,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:54,899 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) [2022-07-21 02:41:54,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 02:41:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 02:41:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:55,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:55,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:55,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:41:55,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:41:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:55,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653933140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:55,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:55,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-07-21 02:41:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000042345] [2022-07-21 02:41:55,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:55,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 02:41:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 02:41:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-07-21 02:41:55,238 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 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) [2022-07-21 02:41:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:55,636 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-07-21 02:41:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 02:41:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 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 46 [2022-07-21 02:41:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:55,637 INFO L225 Difference]: With dead ends: 98 [2022-07-21 02:41:55,637 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 02:41:55,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 02:41:55,638 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:55,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 447 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:41:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 02:41:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2022-07-21 02:41:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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) [2022-07-21 02:41:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-21 02:41:55,672 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2022-07-21 02:41:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:55,672 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-21 02:41:55,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 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) [2022-07-21 02:41:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-21 02:41:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 02:41:55,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:55,675 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:55,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:55,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:55,891 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:55,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:55,891 INFO L85 PathProgramCache]: Analyzing trace with hash 277462207, now seen corresponding path program 14 times [2022-07-21 02:41:55,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:55,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37671276] [2022-07-21 02:41:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 73 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:56,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:56,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37671276] [2022-07-21 02:41:56,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37671276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:56,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783425357] [2022-07-21 02:41:56,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:41:56,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:56,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:56,035 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) [2022-07-21 02:41:56,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 02:41:56,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:56,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:56,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 02:41:56,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 98 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:56,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 98 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:56,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783425357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:56,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:56,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-21 02:41:56,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324840754] [2022-07-21 02:41:56,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:56,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 02:41:56,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 02:41:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-07-21 02:41:56,373 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 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) [2022-07-21 02:41:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:56,599 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-07-21 02:41:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 02:41:56,600 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 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 50 [2022-07-21 02:41:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:56,600 INFO L225 Difference]: With dead ends: 125 [2022-07-21 02:41:56,600 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 02:41:56,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=1645, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 02:41:56,601 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:56,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 141 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 02:41:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-07-21 02:41:56,609 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) [2022-07-21 02:41:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-07-21 02:41:56,610 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2022-07-21 02:41:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:56,610 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-07-21 02:41:56,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 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) [2022-07-21 02:41:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-07-21 02:41:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 02:41:56,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:56,611 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:56,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:56,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 02:41:56,827 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1193657443, now seen corresponding path program 15 times [2022-07-21 02:41:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:56,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241090891] [2022-07-21 02:41:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:56,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:57,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:57,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241090891] [2022-07-21 02:41:57,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241090891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:57,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833943915] [2022-07-21 02:41:57,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:57,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:57,074 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) [2022-07-21 02:41:57,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 02:41:57,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-21 02:41:57,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:57,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 02:41:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:57,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:57,699 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 02:41:57,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-07-21 02:41:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 91 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:57,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:58,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-21 02:41:58,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-21 02:41:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 84 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:58,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833943915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:58,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:58,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-07-21 02:41:58,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830861553] [2022-07-21 02:41:58,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:58,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 02:41:58,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:58,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 02:41:58,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2339, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 02:41:58,342 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 52 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) [2022-07-21 02:41:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:58,983 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-07-21 02:41:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 02:41:58,984 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 52 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) Word has length 52 [2022-07-21 02:41:58,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:58,984 INFO L225 Difference]: With dead ends: 91 [2022-07-21 02:41:58,984 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 02:41:58,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=618, Invalid=5234, Unknown=0, NotChecked=0, Total=5852 [2022-07-21 02:41:58,986 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:58,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 275 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-07-21 02:41:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 02:41:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-21 02:41:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2022-07-21 02:41:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-07-21 02:41:58,994 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-07-21 02:41:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:58,994 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-07-21 02:41:58,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 52 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) [2022-07-21 02:41:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-07-21 02:41:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 02:41:58,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:58,994 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:59,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 02:41:59,203 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1895400709, now seen corresponding path program 16 times [2022-07-21 02:41:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531867865] [2022-07-21 02:41:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:59,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:59,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531867865] [2022-07-21 02:41:59,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531867865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:59,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109963492] [2022-07-21 02:41:59,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:41:59,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:59,481 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) [2022-07-21 02:41:59,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 02:41:59,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:41:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:59,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 02:41:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:59,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:41:59,763 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-21 02:41:59,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 02:42:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:00,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:00,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:42:00,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:42:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:00,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109963492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:00,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:00,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 33 [2022-07-21 02:42:00,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158575925] [2022-07-21 02:42:00,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:00,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 02:42:00,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 02:42:00,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 02:42:00,177 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:00,618 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2022-07-21 02:42:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 02:42:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-21 02:42:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:00,619 INFO L225 Difference]: With dead ends: 99 [2022-07-21 02:42:00,619 INFO L226 Difference]: Without dead ends: 97 [2022-07-21 02:42:00,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 02:42:00,620 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:00,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 488 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 860 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-07-21 02:42:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-21 02:42:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 62. [2022-07-21 02:42:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 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) [2022-07-21 02:42:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-07-21 02:42:00,630 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 54 [2022-07-21 02:42:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:00,631 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-07-21 02:42:00,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-07-21 02:42:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 02:42:00,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:00,631 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:00,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 02:42:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:00,846 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1960813863, now seen corresponding path program 17 times [2022-07-21 02:42:00,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:00,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599602107] [2022-07-21 02:42:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599602107] [2022-07-21 02:42:01,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599602107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313234558] [2022-07-21 02:42:01,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:42:01,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:01,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:01,103 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) [2022-07-21 02:42:01,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 02:42:01,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-21 02:42:01,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 02:42:01,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:01,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:01,273 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-21 02:42:01,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 02:42:01,304 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-21 02:42:01,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 02:42:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 1 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:01,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:01,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:42:01,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:42:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:42:01,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313234558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:01,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:01,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 34 [2022-07-21 02:42:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626159883] [2022-07-21 02:42:01,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 02:42:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 02:42:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 02:42:01,730 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:02,309 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2022-07-21 02:42:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 02:42:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-21 02:42:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:02,310 INFO L225 Difference]: With dead ends: 97 [2022-07-21 02:42:02,310 INFO L226 Difference]: Without dead ends: 95 [2022-07-21 02:42:02,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=2368, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 02:42:02,311 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:02,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 370 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:42:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-21 02:42:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2022-07-21 02:42:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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) [2022-07-21 02:42:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-07-21 02:42:02,323 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2022-07-21 02:42:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:02,323 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-07-21 02:42:02,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-07-21 02:42:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 02:42:02,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:02,324 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:02,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:02,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:02,539 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:02,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1778046481, now seen corresponding path program 18 times [2022-07-21 02:42:02,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:02,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610323261] [2022-07-21 02:42:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:02,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:02,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610323261] [2022-07-21 02:42:02,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610323261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:02,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047887157] [2022-07-21 02:42:02,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:42:02,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:02,809 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) [2022-07-21 02:42:02,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 02:42:02,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-21 02:42:02,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 02:42:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:03,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:03,599 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 02:42:03,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-07-21 02:42:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 120 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:03,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:04,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-21 02:42:04,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-21 02:42:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 112 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:04,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047887157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:04,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:04,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2022-07-21 02:42:04,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220511800] [2022-07-21 02:42:04,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:04,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 02:42:04,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 02:42:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=2821, Unknown=1, NotChecked=0, Total=3192 [2022-07-21 02:42:04,470 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:05,041 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2022-07-21 02:42:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 02:42:05,042 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-21 02:42:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:05,042 INFO L225 Difference]: With dead ends: 101 [2022-07-21 02:42:05,042 INFO L226 Difference]: Without dead ends: 61 [2022-07-21 02:42:05,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=731, Invalid=6408, Unknown=1, NotChecked=0, Total=7140 [2022-07-21 02:42:05,044 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:05,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 358 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-07-21 02:42:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-21 02:42:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-21 02:42:05,057 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) [2022-07-21 02:42:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-21 02:42:05,057 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-07-21 02:42:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:05,058 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-21 02:42:05,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-21 02:42:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 02:42:05,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:05,058 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:05,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:05,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:05,270 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash 71669487, now seen corresponding path program 19 times [2022-07-21 02:42:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:05,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107126130] [2022-07-21 02:42:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:05,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:05,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:05,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107126130] [2022-07-21 02:42:05,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107126130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:05,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900645032] [2022-07-21 02:42:05,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:42:05,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:05,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:05,545 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) [2022-07-21 02:42:05,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 02:42:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:05,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 02:42:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:05,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:05,687 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-21 02:42:05,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 02:42:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:05,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:06,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:42:06,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:42:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:06,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900645032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:06,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:06,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 36 [2022-07-21 02:42:06,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603577668] [2022-07-21 02:42:06,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:06,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 02:42:06,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 02:42:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 02:42:06,128 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 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) [2022-07-21 02:42:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:06,772 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2022-07-21 02:42:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 02:42:06,773 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 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 60 [2022-07-21 02:42:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:06,773 INFO L225 Difference]: With dead ends: 109 [2022-07-21 02:42:06,773 INFO L226 Difference]: Without dead ends: 107 [2022-07-21 02:42:06,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=2077, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 02:42:06,774 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:06,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 584 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1104 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-07-21 02:42:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-21 02:42:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2022-07-21 02:42:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 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) [2022-07-21 02:42:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-07-21 02:42:06,789 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 60 [2022-07-21 02:42:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:06,789 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-07-21 02:42:06,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 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) [2022-07-21 02:42:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-07-21 02:42:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 02:42:06,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:06,790 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:06,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-21 02:42:07,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 02:42:07,023 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash 920885325, now seen corresponding path program 20 times [2022-07-21 02:42:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:07,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620932547] [2022-07-21 02:42:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:07,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:07,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620932547] [2022-07-21 02:42:07,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620932547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:07,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484310455] [2022-07-21 02:42:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:42:07,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:07,269 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) [2022-07-21 02:42:07,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 02:42:07,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:42:07,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 02:42:07,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:07,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:07,436 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-21 02:42:07,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 02:42:07,518 INFO L356 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2022-07-21 02:42:07,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-21 02:42:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 1 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:08,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:08,597 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_253| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_253|)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_253| 4)) 0) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 32)) 0) (not (<= |v_ULTIMATE.start_main_~i~0#1_253| 7))))) is different from false [2022-07-21 02:42:08,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-21 02:42:08,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-07-21 02:42:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-07-21 02:42:08,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484310455] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:08,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:08,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 42 [2022-07-21 02:42:08,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383763549] [2022-07-21 02:42:08,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:08,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 02:42:08,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 02:42:08,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1506, Unknown=1, NotChecked=78, Total=1722 [2022-07-21 02:42:08,650 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 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) [2022-07-21 02:42:09,140 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_253| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_253|)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_253| 4)) 0) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 32)) 0) (not (<= |v_ULTIMATE.start_main_~i~0#1_253| 7))))) (<= |c_ULTIMATE.start_main_~i~0#1| 8) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 8 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2022-07-21 02:42:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:09,197 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-07-21 02:42:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 02:42:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 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 62 [2022-07-21 02:42:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:09,198 INFO L225 Difference]: With dead ends: 107 [2022-07-21 02:42:09,198 INFO L226 Difference]: Without dead ends: 105 [2022-07-21 02:42:09,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=139, Invalid=1507, Unknown=2, NotChecked=158, Total=1806 [2022-07-21 02:42:09,202 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:09,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 616 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 408 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-07-21 02:42:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-21 02:42:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2022-07-21 02:42:09,218 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) [2022-07-21 02:42:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-07-21 02:42:09,218 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-07-21 02:42:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:09,218 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-07-21 02:42:09,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 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) [2022-07-21 02:42:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-07-21 02:42:09,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 02:42:09,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:09,229 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:09,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:09,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 02:42:09,449 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:09,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1314727931, now seen corresponding path program 21 times [2022-07-21 02:42:09,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:09,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007779285] [2022-07-21 02:42:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:09,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:09,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:09,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007779285] [2022-07-21 02:42:09,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007779285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:09,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566013839] [2022-07-21 02:42:09,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:42:09,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:09,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:09,743 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) [2022-07-21 02:42:09,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 02:42:09,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-21 02:42:09,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 02:42:09,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:10,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:10,641 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 02:42:10,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-07-21 02:42:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 153 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:10,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:11,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-21 02:42:11,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-21 02:42:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 144 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:11,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566013839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:11,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:11,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2022-07-21 02:42:11,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104136775] [2022-07-21 02:42:11,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:11,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-21 02:42:11,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:11,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-21 02:42:11,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3350, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 02:42:11,268 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:12,301 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2022-07-21 02:42:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 02:42:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-21 02:42:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:12,302 INFO L225 Difference]: With dead ends: 111 [2022-07-21 02:42:12,302 INFO L226 Difference]: Without dead ends: 67 [2022-07-21 02:42:12,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1024, Invalid=9278, Unknown=0, NotChecked=0, Total=10302 [2022-07-21 02:42:12,303 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:12,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 436 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 172 Unchecked, 0.1s Time] [2022-07-21 02:42:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-21 02:42:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-21 02:42:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 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) [2022-07-21 02:42:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-07-21 02:42:12,319 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2022-07-21 02:42:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:12,320 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-07-21 02:42:12,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-07-21 02:42:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 02:42:12,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:12,320 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:12,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:12,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:12,532 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2021980771, now seen corresponding path program 22 times [2022-07-21 02:42:12,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567389483] [2022-07-21 02:42:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:12,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567389483] [2022-07-21 02:42:12,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567389483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647356868] [2022-07-21 02:42:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:42:12,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:12,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:12,869 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) [2022-07-21 02:42:12,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 02:42:13,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:42:13,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:13,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 02:42:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:13,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:13,421 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-21 02:42:13,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 02:42:17,620 INFO L356 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2022-07-21 02:42:17,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 26 [2022-07-21 02:42:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:17,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:18,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:42:18,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:42:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:42:18,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647356868] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:18,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:18,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 26] total 65 [2022-07-21 02:42:18,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018730843] [2022-07-21 02:42:18,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:18,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 02:42:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 02:42:18,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=3769, Unknown=4, NotChecked=0, Total=4160 [2022-07-21 02:42:18,356 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 65 states, 65 states have (on average 2.6307692307692307) internal successors, (171), 65 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:26,196 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2022-07-21 02:42:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-21 02:42:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6307692307692307) internal successors, (171), 65 states have internal predecessors, (171), 0 states have call successors, (0), 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 66 [2022-07-21 02:42:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:26,197 INFO L225 Difference]: With dead ends: 150 [2022-07-21 02:42:26,197 INFO L226 Difference]: Without dead ends: 148 [2022-07-21 02:42:26,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1366, Invalid=15918, Unknown=8, NotChecked=0, Total=17292 [2022-07-21 02:42:26,198 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:26,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 713 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 398 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-07-21 02:42:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-21 02:42:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2022-07-21 02:42:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 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) [2022-07-21 02:42:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-07-21 02:42:26,235 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 66 [2022-07-21 02:42:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:26,235 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-07-21 02:42:26,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6307692307692307) internal successors, (171), 65 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-07-21 02:42:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 02:42:26,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:26,236 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:26,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:26,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:26,453 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:26,454 INFO L85 PathProgramCache]: Analyzing trace with hash -39467689, now seen corresponding path program 23 times [2022-07-21 02:42:26,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:26,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947465486] [2022-07-21 02:42:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:26,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:26,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947465486] [2022-07-21 02:42:26,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947465486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:26,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417950289] [2022-07-21 02:42:26,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:42:26,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:26,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:26,828 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) [2022-07-21 02:42:26,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 02:42:26,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-21 02:42:26,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:27,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 02:42:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:27,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:27,092 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-21 02:42:27,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 02:42:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:27,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:27,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:42:27,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:42:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:27,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417950289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:27,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:27,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 42 [2022-07-21 02:42:27,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437058982] [2022-07-21 02:42:27,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:27,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 02:42:27,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 02:42:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 02:42:27,683 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 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) [2022-07-21 02:42:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:28,329 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2022-07-21 02:42:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 02:42:28,331 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 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 72 [2022-07-21 02:42:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:28,332 INFO L225 Difference]: With dead ends: 204 [2022-07-21 02:42:28,332 INFO L226 Difference]: Without dead ends: 202 [2022-07-21 02:42:28,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=2871, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 02:42:28,332 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:28,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 812 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1524 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-07-21 02:42:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-21 02:42:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 113. [2022-07-21 02:42:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 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) [2022-07-21 02:42:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-07-21 02:42:28,367 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 72 [2022-07-21 02:42:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:28,367 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-07-21 02:42:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 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) [2022-07-21 02:42:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-07-21 02:42:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 02:42:28,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:28,367 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:28,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:28,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 02:42:28,575 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:28,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1248242101, now seen corresponding path program 24 times [2022-07-21 02:42:28,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:28,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977709488] [2022-07-21 02:42:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:28,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:28,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977709488] [2022-07-21 02:42:28,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977709488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:28,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843223334] [2022-07-21 02:42:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:42:28,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:28,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:28,976 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) [2022-07-21 02:42:28,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 02:42:29,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-21 02:42:29,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 02:42:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:29,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:29,368 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-21 02:42:29,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 02:42:29,378 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-21 02:42:29,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 02:42:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 367 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:42:29,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:30,188 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (+ 40 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) is different from false [2022-07-21 02:42:30,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:42:30,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:42:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 25 not checked. [2022-07-21 02:42:30,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843223334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:30,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:30,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 43 [2022-07-21 02:42:30,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364991400] [2022-07-21 02:42:30,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:30,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 02:42:30,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 02:42:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1611, Unknown=1, NotChecked=80, Total=1806 [2022-07-21 02:42:30,303 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 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) [2022-07-21 02:42:30,871 WARN L833 $PredicateComparison]: unable to prove that (and (<= 11 |c_ULTIMATE.start_main_~i~0#1|) (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ 40 |c_ULTIMATE.start_main_~x~0#1.offset|))) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (+ 40 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0))) is different from false [2022-07-21 02:42:31,242 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 40 |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) .cse0)) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (+ 40 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) (not (= (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) .cse0)))) is different from false [2022-07-21 02:42:31,609 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ 40 |c_ULTIMATE.start_main_~x~0#1.offset|))) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (+ 40 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0))) is different from false [2022-07-21 02:42:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:32,458 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2022-07-21 02:42:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-21 02:42:32,459 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-21 02:42:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:32,460 INFO L225 Difference]: With dead ends: 210 [2022-07-21 02:42:32,460 INFO L226 Difference]: Without dead ends: 208 [2022-07-21 02:42:32,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 128 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=475, Invalid=5857, Unknown=4, NotChecked=636, Total=6972 [2022-07-21 02:42:32,461 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:32,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 760 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1466 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2022-07-21 02:42:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-21 02:42:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 110. [2022-07-21 02:42:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 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) [2022-07-21 02:42:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-07-21 02:42:32,505 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 74 [2022-07-21 02:42:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:32,505 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-07-21 02:42:32,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 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) [2022-07-21 02:42:32,506 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-07-21 02:42:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 02:42:32,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:32,506 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:32,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:32,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 02:42:32,724 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1997172115, now seen corresponding path program 25 times [2022-07-21 02:42:32,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:32,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718384810] [2022-07-21 02:42:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:33,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:33,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718384810] [2022-07-21 02:42:33,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718384810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:33,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838254654] [2022-07-21 02:42:33,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:42:33,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:33,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:33,110 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) [2022-07-21 02:42:33,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 02:42:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 02:42:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:33,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:33,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:33,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:42:33,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:42:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:33,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838254654] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:33,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:33,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 42 [2022-07-21 02:42:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011425796] [2022-07-21 02:42:33,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:33,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 02:42:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 02:42:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 02:42:33,826 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:34,723 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2022-07-21 02:42:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 02:42:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-21 02:42:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:34,725 INFO L225 Difference]: With dead ends: 168 [2022-07-21 02:42:34,725 INFO L226 Difference]: Without dead ends: 166 [2022-07-21 02:42:34,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 134 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=3090, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 02:42:34,726 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:34,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1063 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 02:42:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-21 02:42:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2022-07-21 02:42:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 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) [2022-07-21 02:42:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-07-21 02:42:34,770 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 76 [2022-07-21 02:42:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:34,771 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-07-21 02:42:34,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-07-21 02:42:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 02:42:34,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:34,771 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:34,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-21 02:42:34,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 02:42:34,973 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:34,974 INFO L85 PathProgramCache]: Analyzing trace with hash 516744323, now seen corresponding path program 26 times [2022-07-21 02:42:34,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:34,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929896175] [2022-07-21 02:42:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:34,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 243 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:35,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:35,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929896175] [2022-07-21 02:42:35,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929896175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016578756] [2022-07-21 02:42:35,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:42:35,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:35,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:35,225 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) [2022-07-21 02:42:35,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 02:42:35,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:42:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:35,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 02:42:35,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 288 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:35,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 288 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:35,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016578756] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:35,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:35,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-07-21 02:42:35,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532691443] [2022-07-21 02:42:35,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:35,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 02:42:35,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 02:42:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 02:42:35,794 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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) [2022-07-21 02:42:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:36,307 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2022-07-21 02:42:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 02:42:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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) Word has length 80 [2022-07-21 02:42:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:36,308 INFO L225 Difference]: With dead ends: 215 [2022-07-21 02:42:36,308 INFO L226 Difference]: Without dead ends: 84 [2022-07-21 02:42:36,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1182, Invalid=3930, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 02:42:36,309 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:36,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 315 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:42:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-21 02:42:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-07-21 02:42:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 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) [2022-07-21 02:42:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-07-21 02:42:36,339 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2022-07-21 02:42:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:36,340 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-07-21 02:42:36,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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) [2022-07-21 02:42:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-07-21 02:42:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 02:42:36,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:36,340 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:36,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:36,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 02:42:36,557 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:36,557 INFO L85 PathProgramCache]: Analyzing trace with hash 260737761, now seen corresponding path program 27 times [2022-07-21 02:42:36,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:36,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032798270] [2022-07-21 02:42:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:37,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:37,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032798270] [2022-07-21 02:42:37,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032798270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:37,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688040083] [2022-07-21 02:42:37,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:42:37,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:37,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:37,143 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) [2022-07-21 02:42:37,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 02:42:37,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-21 02:42:37,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:37,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 02:42:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:37,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:38,614 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 02:42:38,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-07-21 02:42:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 276 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:38,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:39,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-21 02:42:39,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-21 02:42:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 264 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:39,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688040083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:39,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:39,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 77 [2022-07-21 02:42:39,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121971818] [2022-07-21 02:42:39,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:39,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-21 02:42:39,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-21 02:42:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=5192, Unknown=0, NotChecked=0, Total=5852 [2022-07-21 02:42:39,671 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 77 states, 77 states have (on average 2.779220779220779) internal successors, (214), 77 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:40,982 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2022-07-21 02:42:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 02:42:40,982 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.779220779220779) internal successors, (214), 77 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-21 02:42:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:40,983 INFO L225 Difference]: With dead ends: 141 [2022-07-21 02:42:40,983 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 02:42:40,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1309, Invalid=12263, Unknown=0, NotChecked=0, Total=13572 [2022-07-21 02:42:40,984 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:40,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 652 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-07-21 02:42:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 02:42:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-21 02:42:41,015 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) [2022-07-21 02:42:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-21 02:42:41,015 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2022-07-21 02:42:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:41,015 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-21 02:42:41,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.779220779220779) internal successors, (214), 77 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-21 02:42:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 02:42:41,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:41,016 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:41,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:41,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:41,219 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash -948432449, now seen corresponding path program 28 times [2022-07-21 02:42:41,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:41,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326641165] [2022-07-21 02:42:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:41,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:41,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326641165] [2022-07-21 02:42:41,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326641165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:41,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858003050] [2022-07-21 02:42:41,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:42:41,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:41,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:41,864 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) [2022-07-21 02:42:41,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 02:42:42,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:42:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:42,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 02:42:42,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:42,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:42:42,457 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-21 02:42:42,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-07-21 02:42:42,515 INFO L356 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-07-21 02:42:42,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-07-21 02:42:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:43,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:45,442 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_447| Int)) (or (forall ((v_ArrVal_1086 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_447| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1086) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 48)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_447|)))) is different from false [2022-07-21 02:42:45,870 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1086 Int) (|v_ULTIMATE.start_main_~i~0#1_447| Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 0) (+ (* |v_ULTIMATE.start_main_~i~0#1_447| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1086) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 48)) 0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_447|)))) is different from false [2022-07-21 02:43:01,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-07-21 02:43:01,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 324 [2022-07-21 02:43:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 27 not checked. [2022-07-21 02:43:01,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858003050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:01,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:01,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 93 [2022-07-21 02:43:01,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392677292] [2022-07-21 02:43:01,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:01,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-21 02:43:01,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-21 02:43:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=7822, Unknown=18, NotChecked=358, Total=8556 [2022-07-21 02:43:01,764 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 93 states, 93 states have (on average 2.6344086021505375) internal successors, (245), 93 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:04,288 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~x~0#1.offset| .cse2)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|))) (and (< 47 .cse0) (forall ((|v_ULTIMATE.start_main_~i~0#1_447| Int)) (or (forall ((v_ArrVal_1086 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_447| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1086) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 48)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_447|)))) (<= .cse0 48) (= |c_ULTIMATE.start_main_~x~0#1.offset| 0) (= 7 (+ (- 5) |c_ULTIMATE.start_main_~i~0#1|)) (= (select .cse1 .cse0) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~x~0#1.offset| .cse2 (- 4))) 0)))) is different from false [2022-07-21 02:43:06,383 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_447| Int)) (or (forall ((v_ArrVal_1086 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_447| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1086) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 48)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_447|)))) (not (= (+ |c_ULTIMATE.start_main_~x~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 48)) (= |c_ULTIMATE.start_main_~x~0#1.offset| 0) (= (select .cse0 48) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 44)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 48)) 0) (<= 13 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-07-21 02:43:48,675 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 39 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:43:50,721 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_447| Int)) (or (forall ((v_ArrVal_1086 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_447| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1086) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 48)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_447|)))) (= |c_ULTIMATE.start_main_~x~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) 48) 0)) is different from false [2022-07-21 02:44:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:11,840 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2022-07-21 02:44:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-21 02:44:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.6344086021505375) internal successors, (245), 93 states have internal predecessors, (245), 0 states have call successors, (0), 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 [2022-07-21 02:44:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:11,841 INFO L225 Difference]: With dead ends: 159 [2022-07-21 02:44:11,841 INFO L226 Difference]: Without dead ends: 157 [2022-07-21 02:44:11,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 3985 ImplicationChecksByTransitivity, 88.6s TimeCoverageRelationStatistics Valid=876, Invalid=18176, Unknown=150, NotChecked=1390, Total=20592 [2022-07-21 02:44:11,842 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 173 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 2921 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 3427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:11,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1501 Invalid, 3427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2921 Invalid, 0 Unknown, 332 Unchecked, 1.0s Time] [2022-07-21 02:44:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-21 02:44:11,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 89. [2022-07-21 02:44:11,874 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) [2022-07-21 02:44:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-07-21 02:44:11,874 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-07-21 02:44:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:11,875 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-07-21 02:44:11,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.6344086021505375) internal successors, (245), 93 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-07-21 02:44:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 02:44:11,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:11,875 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:11,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:12,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:12,076 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1316711125, now seen corresponding path program 29 times [2022-07-21 02:44:12,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:12,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273070157] [2022-07-21 02:44:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:12,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:12,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:12,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273070157] [2022-07-21 02:44:12,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273070157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:12,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988888839] [2022-07-21 02:44:12,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:44:12,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:12,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:12,560 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) [2022-07-21 02:44:12,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 02:44:12,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-21 02:44:12,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 02:44:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:12,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:44:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:13,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:44:13,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:44:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:13,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988888839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:13,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:13,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 48 [2022-07-21 02:44:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200945191] [2022-07-21 02:44:13,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:13,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 02:44:13,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 02:44:13,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2132, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 02:44:13,542 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:14,610 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2022-07-21 02:44:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 02:44:14,610 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 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 [2022-07-21 02:44:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:14,611 INFO L225 Difference]: With dead ends: 99 [2022-07-21 02:44:14,611 INFO L226 Difference]: Without dead ends: 97 [2022-07-21 02:44:14,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=3918, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 02:44:14,613 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:14,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1138 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 02:44:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-21 02:44:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-07-21 02:44:14,648 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) [2022-07-21 02:44:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-21 02:44:14,649 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2022-07-21 02:44:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:14,649 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-21 02:44:14,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-21 02:44:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 02:44:14,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:14,650 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:14,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:14,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-21 02:44:14,859 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:14,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2090841877, now seen corresponding path program 30 times [2022-07-21 02:44:14,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:14,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259515390] [2022-07-21 02:44:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 339 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:15,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:15,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259515390] [2022-07-21 02:44:15,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259515390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:15,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743632917] [2022-07-21 02:44:15,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:44:15,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:15,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:15,221 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) [2022-07-21 02:44:15,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 02:44:15,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-21 02:44:15,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:15,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 02:44:15,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 392 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:15,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 392 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:16,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743632917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:16,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:16,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-21 02:44:16,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210192285] [2022-07-21 02:44:16,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:16,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 02:44:16,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 02:44:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 02:44:16,058 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:16,431 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2022-07-21 02:44:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 02:44:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-21 02:44:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:16,431 INFO L225 Difference]: With dead ends: 160 [2022-07-21 02:44:16,431 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 02:44:16,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 02:44:16,432 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:16,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 323 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:44:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 02:44:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-07-21 02:44:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 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) [2022-07-21 02:44:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-07-21 02:44:16,477 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2022-07-21 02:44:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:16,477 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-07-21 02:44:16,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-07-21 02:44:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-21 02:44:16,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:16,478 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:16,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:16,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:16,696 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash -890154423, now seen corresponding path program 31 times [2022-07-21 02:44:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:16,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109877474] [2022-07-21 02:44:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:16,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:17,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:17,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109877474] [2022-07-21 02:44:17,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109877474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:17,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341306275] [2022-07-21 02:44:17,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:44:17,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:17,149 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) [2022-07-21 02:44:17,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 02:44:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:17,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-21 02:44:17,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:17,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:44:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:17,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:17,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 02:44:17,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-21 02:44:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:17,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341306275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:17,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:17,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 51 [2022-07-21 02:44:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582230569] [2022-07-21 02:44:17,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 02:44:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:17,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 02:44:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2418, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 02:44:17,828 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:18,810 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2022-07-21 02:44:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 02:44:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-21 02:44:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:18,812 INFO L225 Difference]: With dead ends: 105 [2022-07-21 02:44:18,812 INFO L226 Difference]: Without dead ends: 103 [2022-07-21 02:44:18,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=4435, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 02:44:18,813 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:18,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1092 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 02:44:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-21 02:44:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-07-21 02:44:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 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) [2022-07-21 02:44:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-07-21 02:44:18,851 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-07-21 02:44:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:18,852 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-07-21 02:44:18,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:18,852 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-07-21 02:44:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-21 02:44:18,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:18,853 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:18,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-21 02:44:19,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:19,066 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2062374495, now seen corresponding path program 32 times [2022-07-21 02:44:19,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:19,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449314113] [2022-07-21 02:44:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:19,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 393 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:19,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449314113] [2022-07-21 02:44:19,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449314113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:19,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141449029] [2022-07-21 02:44:19,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:44:19,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:19,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:19,419 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) [2022-07-21 02:44:19,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 02:44:19,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:44:19,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:19,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 02:44:19,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 450 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:19,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 450 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:19,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141449029] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:19,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:19,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-21 02:44:19,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846763084] [2022-07-21 02:44:19,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:19,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 02:44:19,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 02:44:19,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 02:44:19,912 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:20,318 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-07-21 02:44:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 02:44:20,318 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-07-21 02:44:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:20,319 INFO L225 Difference]: With dead ends: 170 [2022-07-21 02:44:20,319 INFO L226 Difference]: Without dead ends: 102 [2022-07-21 02:44:20,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1096, Invalid=3734, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 02:44:20,320 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:20,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 251 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:44:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-21 02:44:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-07-21 02:44:20,358 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) [2022-07-21 02:44:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-07-21 02:44:20,359 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2022-07-21 02:44:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:20,359 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-07-21 02:44:20,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-07-21 02:44:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 02:44:20,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:20,360 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:20,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:20,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-21 02:44:20,568 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1772265155, now seen corresponding path program 33 times [2022-07-21 02:44:20,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:20,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587030779] [2022-07-21 02:44:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587030779] [2022-07-21 02:44:21,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587030779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243899918] [2022-07-21 02:44:21,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:44:21,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:21,134 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) [2022-07-21 02:44:21,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 02:44:21,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-07-21 02:44:21,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:21,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 02:44:21,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:21,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:44:22,974 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 02:44:22,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-07-21 02:44:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 435 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:23,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:24,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-21 02:44:24,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-21 02:44:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 420 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:24,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243899918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:24,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:24,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2022-07-21 02:44:24,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612408536] [2022-07-21 02:44:24,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:24,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-21 02:44:24,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-21 02:44:24,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=7462, Unknown=1, NotChecked=0, Total=8372 [2022-07-21 02:44:24,392 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 92 states, 92 states have (on average 2.847826086956522) internal successors, (262), 92 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:26,485 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2022-07-21 02:44:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-21 02:44:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.847826086956522) internal successors, (262), 92 states have internal predecessors, (262), 0 states have call successors, (0), 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 [2022-07-21 02:44:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:26,486 INFO L225 Difference]: With dead ends: 171 [2022-07-21 02:44:26,486 INFO L226 Difference]: Without dead ends: 103 [2022-07-21 02:44:26,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4438 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2149, Invalid=22030, Unknown=1, NotChecked=0, Total=24180 [2022-07-21 02:44:26,487 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:26,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1033 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 681 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-07-21 02:44:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-21 02:44:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-07-21 02:44:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 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) [2022-07-21 02:44:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-07-21 02:44:26,523 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2022-07-21 02:44:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:26,523 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-07-21 02:44:26,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.847826086956522) internal successors, (262), 92 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-07-21 02:44:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-21 02:44:26,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:26,524 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:26,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 02:44:26,742 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:26,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1779028837, now seen corresponding path program 34 times [2022-07-21 02:44:26,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:26,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129782144] [2022-07-21 02:44:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:26,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 739 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:27,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:27,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129782144] [2022-07-21 02:44:27,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129782144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:27,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549538278] [2022-07-21 02:44:27,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:44:27,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:27,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:27,392 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) [2022-07-21 02:44:27,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 02:44:27,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:44:27,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 02:44:27,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:28,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 02:44:28,440 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-21 02:44:28,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-07-21 02:44:29,931 INFO L356 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2022-07-21 02:44:29,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 26 [2022-07-21 02:44:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 435 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:29,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:35,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-21 02:44:35,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2022-07-21 02:44:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 422 proven. 315 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:35,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549538278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:35,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:35,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40, 40] total 97 [2022-07-21 02:44:35,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932615456] [2022-07-21 02:44:35,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:35,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-21 02:44:35,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-21 02:44:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=8309, Unknown=8, NotChecked=0, Total=9312 [2022-07-21 02:44:35,377 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 97 states, 97 states have (on average 2.7628865979381443) internal successors, (268), 97 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:49,916 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2022-07-21 02:44:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-21 02:44:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.7628865979381443) internal successors, (268), 97 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-21 02:44:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:49,916 INFO L225 Difference]: With dead ends: 235 [2022-07-21 02:44:49,916 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 02:44:49,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6015 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=2282, Invalid=27794, Unknown=26, NotChecked=0, Total=30102 [2022-07-21 02:44:49,918 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:49,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 876 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 789 Invalid, 0 Unknown, 273 Unchecked, 0.3s Time] [2022-07-21 02:44:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 02:44:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 02:44:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 02:44:49,919 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2022-07-21 02:44:49,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:49,919 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 02:44:49,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.7628865979381443) internal successors, (268), 97 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 02:44:49,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 02:44:49,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 02:44:49,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:50,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 02:44:50,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.