./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:47:50,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:47:50,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:47:50,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:47:50,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:47:50,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:47:50,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:47:50,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:47:50,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:47:50,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:47:50,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:47:50,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:47:50,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:47:50,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:47:50,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:47:50,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:47:50,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:47:50,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:47:50,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:47:50,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:47:50,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:47:50,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:47:50,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:47:50,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:47:50,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:47:50,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:47:50,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:47:50,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:47:50,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:47:50,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:47:50,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:47:50,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:47:50,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:47:50,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:47:50,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:47:50,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:47:50,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:47:50,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:47:50,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:47:50,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:47:50,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:47:50,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:47:50,772 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:47:50,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:47:50,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:47:50,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:47:50,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:47:50,776 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:47:50,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:47:50,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:47:50,776 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:47:50,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:47:50,777 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:47:50,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:47:50,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:47:50,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:47:50,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:47:50,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:47:50,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:47:50,778 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:47:50,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:47:50,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:47:50,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:47:50,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:47:50,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:47:50,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:47:50,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:47:50,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:47:50,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:47:50,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:47:50,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:47:50,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:47:50,780 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:47:50,781 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:47:50,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:47:50,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:47:50,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 [2021-12-16 22:47:51,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:47:51,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:47:51,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:47:51,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:47:51,022 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:47:51,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr4.c [2021-12-16 22:47:51,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc385439/0f08ad113f3f4a5682097e7fc3af5cf4/FLAGdade7f262 [2021-12-16 22:47:51,382 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:47:51,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c [2021-12-16 22:47:51,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc385439/0f08ad113f3f4a5682097e7fc3af5cf4/FLAGdade7f262 [2021-12-16 22:47:51,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc385439/0f08ad113f3f4a5682097e7fc3af5cf4 [2021-12-16 22:47:51,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:47:51,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:47:51,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:47:51,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:47:51,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:47:51,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:47:51" (1/1) ... [2021-12-16 22:47:51,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d48ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:51, skipping insertion in model container [2021-12-16 22:47:51,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:47:51" (1/1) ... [2021-12-16 22:47:51,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:47:51,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:47:51,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2021-12-16 22:47:52,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:47:52,020 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:47:52,031 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2021-12-16 22:47:52,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:47:52,052 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:47:52,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52 WrapperNode [2021-12-16 22:47:52,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:47:52,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:47:52,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:47:52,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:47:52,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,086 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-12-16 22:47:52,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:47:52,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:47:52,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:47:52,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:47:52,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:47:52,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:47:52,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:47:52,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:47:52,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (1/1) ... [2021-12-16 22:47:52,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:47:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:52,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 22:47:52,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 22:47:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:47:52,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:47:52,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:47:52,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 22:47:52,174 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-16 22:47:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-16 22:47:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:47:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:47:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:47:52,228 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:47:52,229 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:47:52,379 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:47:52,383 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:47:52,383 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 22:47:52,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:47:52 BoogieIcfgContainer [2021-12-16 22:47:52,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:47:52,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:47:52,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:47:52,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:47:52,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:47:51" (1/3) ... [2021-12-16 22:47:52,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217e57df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:47:52, skipping insertion in model container [2021-12-16 22:47:52,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:52" (2/3) ... [2021-12-16 22:47:52,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217e57df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:47:52, skipping insertion in model container [2021-12-16 22:47:52,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:47:52" (3/3) ... [2021-12-16 22:47:52,391 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr4.c [2021-12-16 22:47:52,394 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:47:52,394 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:47:52,441 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:47:52,463 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 22:47:52,463 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:47:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 22:47:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 22:47:52,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:52,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:52,488 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:52,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1807585031, now seen corresponding path program 1 times [2021-12-16 22:47:52,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:52,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328979792] [2021-12-16 22:47:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:52,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:52,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328979792] [2021-12-16 22:47:52,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328979792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:47:52,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:47:52,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 22:47:52,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509501650] [2021-12-16 22:47:52,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:47:52,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 22:47:52,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 22:47:52,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:47:52,831 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:52,937 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2021-12-16 22:47:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:47:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 22:47:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:52,951 INFO L225 Difference]: With dead ends: 84 [2021-12-16 22:47:52,951 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 22:47:52,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:47:52,961 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:52,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 52 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:47:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 22:47:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-12-16 22:47:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 22:47:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-16 22:47:52,997 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 11 [2021-12-16 22:47:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:52,998 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-16 22:47:52,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-16 22:47:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 22:47:53,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:53,000 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:53,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:47:53,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:53,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1998588124, now seen corresponding path program 1 times [2021-12-16 22:47:53,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:53,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390788033] [2021-12-16 22:47:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:53,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:53,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:53,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:47:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:53,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:47:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:53,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:53,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390788033] [2021-12-16 22:47:53,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390788033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:53,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315531850] [2021-12-16 22:47:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:53,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:53,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:53,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:47:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:53,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 22:47:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:53,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:53,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:53,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:47:53,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:53,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:47:53,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:53,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 22:47:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:53,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:53,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 22:47:53,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-16 22:47:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:53,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315531850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:53,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:53,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2021-12-16 22:47:53,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236249033] [2021-12-16 22:47:53,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:53,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 22:47:53,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 22:47:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:47:53,878 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 22:47:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:54,176 INFO L93 Difference]: Finished difference Result 102 states and 141 transitions. [2021-12-16 22:47:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:47:54,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 37 [2021-12-16 22:47:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:54,178 INFO L225 Difference]: With dead ends: 102 [2021-12-16 22:47:54,178 INFO L226 Difference]: Without dead ends: 100 [2021-12-16 22:47:54,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:47:54,179 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 96 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:54,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 313 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:47:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-16 22:47:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2021-12-16 22:47:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 22:47:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2021-12-16 22:47:54,188 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 37 [2021-12-16 22:47:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:54,189 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2021-12-16 22:47:54,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 22:47:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2021-12-16 22:47:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 22:47:54,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:54,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:54,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 22:47:54,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:54,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1858039514, now seen corresponding path program 1 times [2021-12-16 22:47:54,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:54,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82919558] [2021-12-16 22:47:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:54,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:54,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:54,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:47:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:54,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:47:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:54,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:54,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82919558] [2021-12-16 22:47:54,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82919558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:54,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647445936] [2021-12-16 22:47:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:54,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:54,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:54,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:54,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:47:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:47:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:54,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:54,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:54,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:47:54,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:54,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:47:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:54,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 22:47:55,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:47:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 22:47:55,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:55,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 22:47:55,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-16 22:47:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:56,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647445936] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:56,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:56,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-16 22:47:56,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107807599] [2021-12-16 22:47:56,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:56,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:47:56,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:47:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:47:56,029 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:47:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:56,762 INFO L93 Difference]: Finished difference Result 172 states and 236 transitions. [2021-12-16 22:47:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 22:47:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2021-12-16 22:47:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:56,766 INFO L225 Difference]: With dead ends: 172 [2021-12-16 22:47:56,766 INFO L226 Difference]: Without dead ends: 170 [2021-12-16 22:47:56,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2021-12-16 22:47:56,767 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 187 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:56,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 501 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 545 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2021-12-16 22:47:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-16 22:47:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 75. [2021-12-16 22:47:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 57 states have internal predecessors, (75), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 22:47:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 107 transitions. [2021-12-16 22:47:56,780 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 107 transitions. Word has length 37 [2021-12-16 22:47:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:56,780 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 107 transitions. [2021-12-16 22:47:56,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:47:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 107 transitions. [2021-12-16 22:47:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 22:47:56,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:56,782 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:56,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:56,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 22:47:56,998 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1526874982, now seen corresponding path program 1 times [2021-12-16 22:47:56,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:56,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544319006] [2021-12-16 22:47:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:56,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:57,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:57,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:57,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:47:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:57,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:47:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:57,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:57,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544319006] [2021-12-16 22:47:57,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544319006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:57,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104018730] [2021-12-16 22:47:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:57,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:57,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:57,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:47:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 22:47:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:57,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:57,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:47:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:57,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:47:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:57,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:57,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:57,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:47:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:57,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104018730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:57,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:57,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 14 [2021-12-16 22:47:57,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255679015] [2021-12-16 22:47:57,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:57,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:47:57,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:57,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:47:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:47:57,484 INFO L87 Difference]: Start difference. First operand 75 states and 107 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 22:47:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:57,820 INFO L93 Difference]: Finished difference Result 262 states and 392 transitions. [2021-12-16 22:47:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 22:47:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2021-12-16 22:47:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:57,823 INFO L225 Difference]: With dead ends: 262 [2021-12-16 22:47:57,824 INFO L226 Difference]: Without dead ends: 260 [2021-12-16 22:47:57,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:47:57,827 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 113 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:57,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 354 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:47:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-16 22:47:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 125. [2021-12-16 22:47:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 94 states have (on average 1.372340425531915) internal successors, (129), 95 states have internal predecessors, (129), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-16 22:47:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2021-12-16 22:47:57,864 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 41 [2021-12-16 22:47:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:57,864 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2021-12-16 22:47:57,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 22:47:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2021-12-16 22:47:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 22:47:57,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:57,869 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:57,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:58,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:58,084 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 962653980, now seen corresponding path program 1 times [2021-12-16 22:47:58,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614901242] [2021-12-16 22:47:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:58,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:47:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:47:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:58,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:58,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614901242] [2021-12-16 22:47:58,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614901242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:58,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250731750] [2021-12-16 22:47:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:58,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:58,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:58,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:58,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:47:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:47:58,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:58,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:58,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:47:58,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:47:58,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:47:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:47:58,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:59,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:59,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:47:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:59,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250731750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:59,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:59,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2021-12-16 22:47:59,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248703099] [2021-12-16 22:47:59,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:59,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 22:47:59,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 22:47:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:47:59,190 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:47:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:59,585 INFO L93 Difference]: Finished difference Result 253 states and 365 transitions. [2021-12-16 22:47:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:47:59,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2021-12-16 22:47:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:59,588 INFO L225 Difference]: With dead ends: 253 [2021-12-16 22:47:59,588 INFO L226 Difference]: Without dead ends: 251 [2021-12-16 22:47:59,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 74 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 22:47:59,589 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 96 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:59,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 528 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 392 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-12-16 22:47:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-16 22:47:59,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 147. [2021-12-16 22:47:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 110 states have (on average 1.3818181818181818) internal successors, (152), 111 states have internal predecessors, (152), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-16 22:47:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 218 transitions. [2021-12-16 22:47:59,604 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 218 transitions. Word has length 41 [2021-12-16 22:47:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:59,604 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 218 transitions. [2021-12-16 22:47:59,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:47:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 218 transitions. [2021-12-16 22:47:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 22:47:59,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:59,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:59,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:59,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:59,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1663718558, now seen corresponding path program 1 times [2021-12-16 22:47:59,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:59,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058704688] [2021-12-16 22:47:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:59,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:59,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:59,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:59,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:47:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:47:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:59,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:59,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058704688] [2021-12-16 22:47:59,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058704688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:59,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555351728] [2021-12-16 22:47:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:59,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:59,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:59,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:59,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:48:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:00,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:48:00,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:00,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:00,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:00,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:48:00,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:48:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:48:00,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:00,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:00,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:48:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:00,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555351728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:00,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:00,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2021-12-16 22:48:00,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957169253] [2021-12-16 22:48:00,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:00,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 22:48:00,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:00,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 22:48:00,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-12-16 22:48:00,963 INFO L87 Difference]: Start difference. First operand 147 states and 218 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:48:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:01,820 INFO L93 Difference]: Finished difference Result 407 states and 594 transitions. [2021-12-16 22:48:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 22:48:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2021-12-16 22:48:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:01,823 INFO L225 Difference]: With dead ends: 407 [2021-12-16 22:48:01,823 INFO L226 Difference]: Without dead ends: 405 [2021-12-16 22:48:01,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=1791, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 22:48:01,824 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 177 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:01,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 736 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 856 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2021-12-16 22:48:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-16 22:48:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 186. [2021-12-16 22:48:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 134 states have (on average 1.3955223880597014) internal successors, (187), 139 states have internal predecessors, (187), 47 states have call successors, (47), 4 states have call predecessors, (47), 4 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-16 22:48:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2021-12-16 22:48:01,840 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 41 [2021-12-16 22:48:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:01,840 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2021-12-16 22:48:01,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:48:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2021-12-16 22:48:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 22:48:01,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:01,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:01,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:02,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:02,058 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1227872016, now seen corresponding path program 2 times [2021-12-16 22:48:02,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:02,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262662172] [2021-12-16 22:48:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:02,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:02,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:02,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:02,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:02,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:02,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:02,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262662172] [2021-12-16 22:48:02,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262662172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:02,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923184119] [2021-12-16 22:48:02,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:48:02,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:02,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:02,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:02,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:48:02,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:48:02,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:48:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:02,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:02,264 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:48:02,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:48:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:02,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:02,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:02,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:48:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:02,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923184119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:02,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:02,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-16 22:48:02,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855261033] [2021-12-16 22:48:02,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:02,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 22:48:02,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:02,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 22:48:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:48:02,405 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:48:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:02,891 INFO L93 Difference]: Finished difference Result 1231 states and 1939 transitions. [2021-12-16 22:48:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 22:48:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2021-12-16 22:48:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:02,914 INFO L225 Difference]: With dead ends: 1231 [2021-12-16 22:48:02,914 INFO L226 Difference]: Without dead ends: 1229 [2021-12-16 22:48:02,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:48:02,916 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 84 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:02,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 595 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:48:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-12-16 22:48:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 405. [2021-12-16 22:48:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 296 states have (on average 1.4324324324324325) internal successors, (424), 298 states have internal predecessors, (424), 104 states have call successors, (104), 4 states have call predecessors, (104), 4 states have return successors, (104), 102 states have call predecessors, (104), 104 states have call successors, (104) [2021-12-16 22:48:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 632 transitions. [2021-12-16 22:48:02,995 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 632 transitions. Word has length 45 [2021-12-16 22:48:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:02,996 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 632 transitions. [2021-12-16 22:48:02,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:48:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 632 transitions. [2021-12-16 22:48:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 22:48:03,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:03,000 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:03,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:03,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:03,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1650573842, now seen corresponding path program 1 times [2021-12-16 22:48:03,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:03,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481820091] [2021-12-16 22:48:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:03,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:03,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:03,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:03,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:03,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:03,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:03,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481820091] [2021-12-16 22:48:03,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481820091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:03,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059491807] [2021-12-16 22:48:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:03,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:03,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:03,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:48:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:03,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 22:48:03,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:03,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:03,600 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:48:03,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:48:03,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 22:48:03,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:03,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:03,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:48:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:03,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059491807] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:03,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:03,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-16 22:48:03,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830607835] [2021-12-16 22:48:03,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:03,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 22:48:03,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:03,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 22:48:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:48:03,919 INFO L87 Difference]: Start difference. First operand 405 states and 632 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:48:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:04,981 INFO L93 Difference]: Finished difference Result 1422 states and 2203 transitions. [2021-12-16 22:48:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-16 22:48:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 45 [2021-12-16 22:48:04,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:04,987 INFO L225 Difference]: With dead ends: 1422 [2021-12-16 22:48:04,987 INFO L226 Difference]: Without dead ends: 1420 [2021-12-16 22:48:04,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=503, Invalid=2689, Unknown=0, NotChecked=0, Total=3192 [2021-12-16 22:48:04,989 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 287 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:04,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 811 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1056 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2021-12-16 22:48:04,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-12-16 22:48:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 535. [2021-12-16 22:48:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 388 states have (on average 1.4458762886597938) internal successors, (561), 391 states have internal predecessors, (561), 141 states have call successors, (141), 5 states have call predecessors, (141), 5 states have return successors, (141), 138 states have call predecessors, (141), 141 states have call successors, (141) [2021-12-16 22:48:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 843 transitions. [2021-12-16 22:48:05,032 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 843 transitions. Word has length 45 [2021-12-16 22:48:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:05,032 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 843 transitions. [2021-12-16 22:48:05,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:48:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 843 transitions. [2021-12-16 22:48:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 22:48:05,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:05,034 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:05,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:05,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:05,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:05,251 INFO L85 PathProgramCache]: Analyzing trace with hash -112998778, now seen corresponding path program 3 times [2021-12-16 22:48:05,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:05,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430178295] [2021-12-16 22:48:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:05,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:05,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:05,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:05,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:05,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430178295] [2021-12-16 22:48:05,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430178295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545231890] [2021-12-16 22:48:05,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:48:05,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:05,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:05,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:05,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:48:05,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 22:48:05,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:48:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:05,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:48:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:05,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:05,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 22:48:05,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-16 22:48:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:05,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545231890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:05,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:05,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-16 22:48:05,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330454390] [2021-12-16 22:48:05,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:05,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 22:48:05,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 22:48:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:48:05,866 INFO L87 Difference]: Start difference. First operand 535 states and 843 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 22:48:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:08,354 INFO L93 Difference]: Finished difference Result 4787 states and 7440 transitions. [2021-12-16 22:48:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-16 22:48:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 49 [2021-12-16 22:48:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:08,371 INFO L225 Difference]: With dead ends: 4787 [2021-12-16 22:48:08,371 INFO L226 Difference]: Without dead ends: 4785 [2021-12-16 22:48:08,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1251, Invalid=6231, Unknown=0, NotChecked=0, Total=7482 [2021-12-16 22:48:08,376 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 385 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 732 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 732 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:08,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 1427 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [732 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 22:48:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4785 states. [2021-12-16 22:48:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4785 to 1417. [2021-12-16 22:48:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1024 states have (on average 1.4677734375) internal successors, (1503), 1024 states have internal predecessors, (1503), 387 states have call successors, (387), 5 states have call predecessors, (387), 5 states have return successors, (387), 387 states have call predecessors, (387), 387 states have call successors, (387) [2021-12-16 22:48:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2277 transitions. [2021-12-16 22:48:08,513 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2277 transitions. Word has length 49 [2021-12-16 22:48:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:08,514 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2277 transitions. [2021-12-16 22:48:08,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 22:48:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2277 transitions. [2021-12-16 22:48:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 22:48:08,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:08,517 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:08,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:08,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 22:48:08,723 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:08,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:08,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1801942520, now seen corresponding path program 1 times [2021-12-16 22:48:08,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:08,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705535028] [2021-12-16 22:48:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:08,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:08,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:08,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:08,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:08,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705535028] [2021-12-16 22:48:08,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705535028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754745722] [2021-12-16 22:48:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:08,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:08,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:08,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:08,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:48:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 22:48:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:09,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:48:09,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:09,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:09,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:09,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:48:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:09,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754745722] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:09,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:09,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-16 22:48:09,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675814956] [2021-12-16 22:48:09,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:09,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 22:48:09,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 22:48:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:48:09,417 INFO L87 Difference]: Start difference. First operand 1417 states and 2277 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 22:48:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:12,762 INFO L93 Difference]: Finished difference Result 4997 states and 7943 transitions. [2021-12-16 22:48:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-16 22:48:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 49 [2021-12-16 22:48:12,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:12,779 INFO L225 Difference]: With dead ends: 4997 [2021-12-16 22:48:12,779 INFO L226 Difference]: Without dead ends: 4995 [2021-12-16 22:48:12,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1221, Invalid=7521, Unknown=0, NotChecked=0, Total=8742 [2021-12-16 22:48:12,784 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 525 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 1389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 4396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1389 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:12,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1206 Invalid, 4396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1389 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-16 22:48:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2021-12-16 22:48:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 559. [2021-12-16 22:48:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 412 states have (on average 1.4296116504854368) internal successors, (589), 415 states have internal predecessors, (589), 141 states have call successors, (141), 5 states have call predecessors, (141), 5 states have return successors, (141), 138 states have call predecessors, (141), 141 states have call successors, (141) [2021-12-16 22:48:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 871 transitions. [2021-12-16 22:48:12,925 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 871 transitions. Word has length 49 [2021-12-16 22:48:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:12,925 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 871 transitions. [2021-12-16 22:48:12,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 22:48:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 871 transitions. [2021-12-16 22:48:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 22:48:12,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:12,926 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:12,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:13,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:48:13,155 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1773729028, now seen corresponding path program 4 times [2021-12-16 22:48:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:13,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759369559] [2021-12-16 22:48:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:13,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:13,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759369559] [2021-12-16 22:48:13,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759369559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250132068] [2021-12-16 22:48:13,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:48:13,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:13,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:13,386 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:13,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:48:13,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:48:13,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 22:48:13,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:13,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:48:13,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250132068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:13,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:13,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2021-12-16 22:48:13,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519233779] [2021-12-16 22:48:13,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:13,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 22:48:13,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 22:48:13,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:48:13,988 INFO L87 Difference]: Start difference. First operand 559 states and 871 transitions. Second operand has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 22:48:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:14,255 INFO L93 Difference]: Finished difference Result 733 states and 1126 transitions. [2021-12-16 22:48:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:48:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 53 [2021-12-16 22:48:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:14,259 INFO L225 Difference]: With dead ends: 733 [2021-12-16 22:48:14,259 INFO L226 Difference]: Without dead ends: 709 [2021-12-16 22:48:14,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=927, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 22:48:14,260 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 333 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:14,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 117 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:48:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-12-16 22:48:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 576. [2021-12-16 22:48:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 428 states have (on average 1.4135514018691588) internal successors, (605), 428 states have internal predecessors, (605), 142 states have call successors, (142), 5 states have call predecessors, (142), 5 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2021-12-16 22:48:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 889 transitions. [2021-12-16 22:48:14,311 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 889 transitions. Word has length 53 [2021-12-16 22:48:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:14,311 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 889 transitions. [2021-12-16 22:48:14,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 22:48:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 889 transitions. [2021-12-16 22:48:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 22:48:14,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:14,313 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:14,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:14,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 22:48:14,527 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1645650707, now seen corresponding path program 2 times [2021-12-16 22:48:14,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827196479] [2021-12-16 22:48:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:14,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:48:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:48:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:48:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:48:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:14,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:14,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827196479] [2021-12-16 22:48:14,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827196479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:14,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764277280] [2021-12-16 22:48:14,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:48:14,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:14,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:14,696 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:14,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:48:14,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:48:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 22:48:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:14,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:14,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:14,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:14,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:14,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:14,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:48:15,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:15,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:48:15,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:15,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:48:15,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:15,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:48:15,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:48:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 22:48:15,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:16,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764277280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:16,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:48:16,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-16 22:48:16,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440646328] [2021-12-16 22:48:16,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:16,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 22:48:16,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 22:48:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2021-12-16 22:48:16,437 INFO L87 Difference]: Start difference. First operand 576 states and 889 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-16 22:48:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:17,140 INFO L93 Difference]: Finished difference Result 1031 states and 1543 transitions. [2021-12-16 22:48:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 22:48:17,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 63 [2021-12-16 22:48:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:17,143 INFO L225 Difference]: With dead ends: 1031 [2021-12-16 22:48:17,143 INFO L226 Difference]: Without dead ends: 1029 [2021-12-16 22:48:17,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 89 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=269, Invalid=1370, Unknown=1, NotChecked=0, Total=1640 [2021-12-16 22:48:17,145 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 155 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:17,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 514 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 605 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2021-12-16 22:48:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-12-16 22:48:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 600. [2021-12-16 22:48:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 440 states have (on average 1.4068181818181817) internal successors, (619), 446 states have internal predecessors, (619), 150 states have call successors, (150), 9 states have call predecessors, (150), 9 states have return successors, (150), 144 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-16 22:48:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 919 transitions. [2021-12-16 22:48:17,212 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 919 transitions. Word has length 63 [2021-12-16 22:48:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:17,212 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 919 transitions. [2021-12-16 22:48:17,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-16 22:48:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 919 transitions. [2021-12-16 22:48:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 22:48:17,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:17,214 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:17,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:17,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 22:48:17,427 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:17,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1480379401, now seen corresponding path program 2 times [2021-12-16 22:48:17,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:17,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728741286] [2021-12-16 22:48:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:17,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:48:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:48:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:48:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:48:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:17,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:17,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728741286] [2021-12-16 22:48:17,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728741286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:17,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773665020] [2021-12-16 22:48:17,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:48:17,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:17,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:17,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:17,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:48:17,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:48:17,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:17,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 22:48:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:17,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:17,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:17,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:17,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:17,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:18,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:18,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:48:18,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:18,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:48:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 22:48:18,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:19,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773665020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:19,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:48:19,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-16 22:48:19,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957144512] [2021-12-16 22:48:19,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:19,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:48:19,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:19,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:48:19,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=390, Unknown=1, NotChecked=0, Total=462 [2021-12-16 22:48:19,163 INFO L87 Difference]: Start difference. First operand 600 states and 919 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-16 22:48:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:20,056 INFO L93 Difference]: Finished difference Result 983 states and 1466 transitions. [2021-12-16 22:48:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 22:48:20,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 67 [2021-12-16 22:48:20,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:20,060 INFO L225 Difference]: With dead ends: 983 [2021-12-16 22:48:20,060 INFO L226 Difference]: Without dead ends: 981 [2021-12-16 22:48:20,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 90 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=341, Invalid=1820, Unknown=1, NotChecked=0, Total=2162 [2021-12-16 22:48:20,061 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 161 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:20,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 647 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 758 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2021-12-16 22:48:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-12-16 22:48:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 606. [2021-12-16 22:48:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 444 states have (on average 1.4031531531531531) internal successors, (623), 450 states have internal predecessors, (623), 150 states have call successors, (150), 11 states have call predecessors, (150), 11 states have return successors, (150), 144 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-16 22:48:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 923 transitions. [2021-12-16 22:48:20,133 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 923 transitions. Word has length 67 [2021-12-16 22:48:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:20,133 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 923 transitions. [2021-12-16 22:48:20,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-16 22:48:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 923 transitions. [2021-12-16 22:48:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 22:48:20,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:20,136 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:20,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:20,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 22:48:20,353 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash 949660519, now seen corresponding path program 5 times [2021-12-16 22:48:20,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:20,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127919539] [2021-12-16 22:48:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:20,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:48:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:48:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:48:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:48:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:20,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:20,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127919539] [2021-12-16 22:48:20,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127919539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:20,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517990139] [2021-12-16 22:48:20,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:48:20,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:20,482 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:20,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:48:20,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-16 22:48:20,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 22:48:20,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:20,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:20,655 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:20,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:48:20,676 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:20,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:48:20,700 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:20,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:48:20,837 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:48:20,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:48:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:20,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:20,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:20,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:48:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:20,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517990139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:20,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:20,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2021-12-16 22:48:20,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469922022] [2021-12-16 22:48:20,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:20,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 22:48:21,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 22:48:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-16 22:48:21,000 INFO L87 Difference]: Start difference. First operand 606 states and 923 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-16 22:48:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:24,336 INFO L93 Difference]: Finished difference Result 8809 states and 14098 transitions. [2021-12-16 22:48:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-16 22:48:24,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 79 [2021-12-16 22:48:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:24,366 INFO L225 Difference]: With dead ends: 8809 [2021-12-16 22:48:24,366 INFO L226 Difference]: Without dead ends: 8807 [2021-12-16 22:48:24,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 163 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2806 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=834, Invalid=6822, Unknown=0, NotChecked=0, Total=7656 [2021-12-16 22:48:24,371 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 259 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 3242 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 3242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:24,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1431 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 3242 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-16 22:48:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8807 states. [2021-12-16 22:48:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8807 to 1437. [2021-12-16 22:48:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1050 states have (on average 1.4476190476190476) internal successors, (1520), 1056 states have internal predecessors, (1520), 375 states have call successors, (375), 11 states have call predecessors, (375), 11 states have return successors, (375), 369 states have call predecessors, (375), 375 states have call successors, (375) [2021-12-16 22:48:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2270 transitions. [2021-12-16 22:48:24,658 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2270 transitions. Word has length 79 [2021-12-16 22:48:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:24,658 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 2270 transitions. [2021-12-16 22:48:24,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-16 22:48:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2270 transitions. [2021-12-16 22:48:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 22:48:24,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:24,660 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:24,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-16 22:48:24,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 22:48:24,870 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1373307241, now seen corresponding path program 1 times [2021-12-16 22:48:24,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:24,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498716850] [2021-12-16 22:48:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:24,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:48:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:48:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:48:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:48:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:25,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498716850] [2021-12-16 22:48:25,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498716850] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755533541] [2021-12-16 22:48:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:25,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:25,033 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:25,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 22:48:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:25,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:48:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:25,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:25,341 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:25,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:25,400 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:25,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:25,457 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:48:25,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:48:25,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 22:48:25,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:28,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:48:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:28,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755533541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:28,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:28,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-16 22:48:28,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352947029] [2021-12-16 22:48:28,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:28,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:48:28,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:48:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=938, Unknown=1, NotChecked=0, Total=1056 [2021-12-16 22:48:28,970 INFO L87 Difference]: Start difference. First operand 1437 states and 2270 transitions. Second operand has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:48:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:32,205 INFO L93 Difference]: Finished difference Result 2364 states and 3712 transitions. [2021-12-16 22:48:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 22:48:32,206 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 79 [2021-12-16 22:48:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:32,238 INFO L225 Difference]: With dead ends: 2364 [2021-12-16 22:48:32,238 INFO L226 Difference]: Without dead ends: 2362 [2021-12-16 22:48:32,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=397, Invalid=2681, Unknown=2, NotChecked=0, Total=3080 [2021-12-16 22:48:32,242 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 238 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:32,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 807 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1065 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2021-12-16 22:48:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-12-16 22:48:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1516. [2021-12-16 22:48:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1108 states have (on average 1.4467509025270757) internal successors, (1603), 1114 states have internal predecessors, (1603), 392 states have call successors, (392), 15 states have call predecessors, (392), 15 states have return successors, (392), 386 states have call predecessors, (392), 392 states have call successors, (392) [2021-12-16 22:48:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2387 transitions. [2021-12-16 22:48:32,473 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2387 transitions. Word has length 79 [2021-12-16 22:48:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 2387 transitions. [2021-12-16 22:48:32,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:48:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2387 transitions. [2021-12-16 22:48:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 22:48:32,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:32,476 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:32,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:32,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:32,693 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:32,693 INFO L85 PathProgramCache]: Analyzing trace with hash -432131093, now seen corresponding path program 1 times [2021-12-16 22:48:32,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:32,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784964446] [2021-12-16 22:48:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:32,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:48:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:48:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:48:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:48:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:32,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:32,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784964446] [2021-12-16 22:48:32,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784964446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:32,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675908825] [2021-12-16 22:48:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:32,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:32,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:32,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:32,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 22:48:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:48:32,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:33,168 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:33,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:33,242 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:33,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:33,304 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:48:33,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:48:33,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 22:48:33,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:36,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:36,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:48:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:36,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675908825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:36,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:36,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2021-12-16 22:48:36,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910793943] [2021-12-16 22:48:36,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:36,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 22:48:36,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:36,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 22:48:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=999, Unknown=1, NotChecked=0, Total=1122 [2021-12-16 22:48:36,816 INFO L87 Difference]: Start difference. First operand 1516 states and 2387 transitions. Second operand has 34 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 34 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:48:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:37,637 INFO L93 Difference]: Finished difference Result 1916 states and 2988 transitions. [2021-12-16 22:48:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 22:48:37,638 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 34 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 79 [2021-12-16 22:48:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:37,642 INFO L225 Difference]: With dead ends: 1916 [2021-12-16 22:48:37,642 INFO L226 Difference]: Without dead ends: 1914 [2021-12-16 22:48:37,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 151 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=275, Invalid=2076, Unknown=1, NotChecked=0, Total=2352 [2021-12-16 22:48:37,643 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 191 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:37,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1034 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 961 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2021-12-16 22:48:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-12-16 22:48:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1516. [2021-12-16 22:48:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1108 states have (on average 1.4467509025270757) internal successors, (1603), 1114 states have internal predecessors, (1603), 392 states have call successors, (392), 15 states have call predecessors, (392), 15 states have return successors, (392), 386 states have call predecessors, (392), 392 states have call successors, (392) [2021-12-16 22:48:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2387 transitions. [2021-12-16 22:48:37,841 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2387 transitions. Word has length 79 [2021-12-16 22:48:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:37,842 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 2387 transitions. [2021-12-16 22:48:37,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 34 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:48:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2387 transitions. [2021-12-16 22:48:37,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 22:48:37,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:37,845 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:37,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 22:48:38,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 22:48:38,062 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1535456661, now seen corresponding path program 1 times [2021-12-16 22:48:38,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:38,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524006730] [2021-12-16 22:48:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:38,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:48:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:48:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:48:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:48:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:48:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:48:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:38,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:38,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524006730] [2021-12-16 22:48:38,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524006730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:38,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749201354] [2021-12-16 22:48:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:38,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:38,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:38,255 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:48:38,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 22:48:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:48:38,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:38,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:38,620 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:38,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:38,674 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:38,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:38,728 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:48:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:48:38,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 22:48:38,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:40,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:40,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:48:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749201354] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:40,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:40,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-16 22:48:40,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227233244] [2021-12-16 22:48:40,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:40,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:48:40,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:48:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:48:40,207 INFO L87 Difference]: Start difference. First operand 1516 states and 2387 transitions. Second operand has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:49:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:35,433 INFO L93 Difference]: Finished difference Result 7908 states and 12574 transitions. [2021-12-16 22:49:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-16 22:49:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 79 [2021-12-16 22:49:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:35,454 INFO L225 Difference]: With dead ends: 7908 [2021-12-16 22:49:35,455 INFO L226 Difference]: Without dead ends: 7906 [2021-12-16 22:49:35,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5857 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=1949, Invalid=13776, Unknown=25, NotChecked=0, Total=15750 [2021-12-16 22:49:35,459 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 533 mSDsluCounter, 2291 mSDsCounter, 0 mSdLazyCounter, 5118 mSolverCounterSat, 1298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 2559 SdHoareTripleChecker+Invalid, 6826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1298 IncrementalHoareTripleChecker+Valid, 5118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:35,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 2559 Invalid, 6826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1298 Valid, 5118 Invalid, 0 Unknown, 410 Unchecked, 2.5s Time] [2021-12-16 22:49:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7906 states. [2021-12-16 22:49:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7906 to 1745. [2021-12-16 22:49:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1262 states have (on average 1.4500792393026942) internal successors, (1830), 1276 states have internal predecessors, (1830), 463 states have call successors, (463), 19 states have call predecessors, (463), 19 states have return successors, (463), 449 states have call predecessors, (463), 463 states have call successors, (463) [2021-12-16 22:49:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2756 transitions. [2021-12-16 22:49:35,754 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2756 transitions. Word has length 79 [2021-12-16 22:49:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:35,754 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 2756 transitions. [2021-12-16 22:49:35,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:49:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2756 transitions. [2021-12-16 22:49:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 22:49:35,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:35,757 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:35,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:35,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 22:49:35,980 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -739338403, now seen corresponding path program 6 times [2021-12-16 22:49:35,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414684074] [2021-12-16 22:49:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:35,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:49:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:49:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:49:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:49:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:49:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:49:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:49:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:49:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:36,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:36,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414684074] [2021-12-16 22:49:36,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414684074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:36,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308851148] [2021-12-16 22:49:36,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:49:36,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:36,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:36,163 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:36,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 22:49:36,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-16 22:49:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:36,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 22:49:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:36,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:49:44,472 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:49:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:49:52,554 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:49:52,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:49:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 22:49:52,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:54,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 22:49:54,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-16 22:49:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:55,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308851148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:55,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:55,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 26 [2021-12-16 22:49:55,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156097580] [2021-12-16 22:49:55,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:55,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 22:49:55,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 22:49:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=547, Unknown=5, NotChecked=0, Total=650 [2021-12-16 22:49:55,012 INFO L87 Difference]: Start difference. First operand 1745 states and 2756 transitions. Second operand has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-16 22:51:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:51:42,865 INFO L93 Difference]: Finished difference Result 22344 states and 36074 transitions. [2021-12-16 22:51:42,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-16 22:51:42,865 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 83 [2021-12-16 22:51:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:51:42,948 INFO L225 Difference]: With dead ends: 22344 [2021-12-16 22:51:42,948 INFO L226 Difference]: Without dead ends: 22342 [2021-12-16 22:51:42,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 197 SyntacticMatches, 9 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5186 ImplicationChecksByTransitivity, 119.7s TimeCoverageRelationStatistics Valid=1412, Invalid=12339, Unknown=55, NotChecked=0, Total=13806 [2021-12-16 22:51:42,957 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 444 mSDsluCounter, 2047 mSDsCounter, 0 mSdLazyCounter, 6397 mSolverCounterSat, 940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2448 SdHoareTripleChecker+Invalid, 8061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 940 IncrementalHoareTripleChecker+Valid, 6397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 724 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:51:42,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 2448 Invalid, 8061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [940 Valid, 6397 Invalid, 0 Unknown, 724 Unchecked, 3.0s Time] [2021-12-16 22:51:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22342 states. [2021-12-16 22:51:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22342 to 3362. [2021-12-16 22:51:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 2442 states have (on average 1.4578214578214579) internal successors, (3560), 2456 states have internal predecessors, (3560), 888 states have call successors, (888), 31 states have call predecessors, (888), 31 states have return successors, (888), 874 states have call predecessors, (888), 888 states have call successors, (888) [2021-12-16 22:51:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 5336 transitions. [2021-12-16 22:51:43,741 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 5336 transitions. Word has length 83 [2021-12-16 22:51:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:51:43,741 INFO L470 AbstractCegarLoop]: Abstraction has 3362 states and 5336 transitions. [2021-12-16 22:51:43,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-16 22:51:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 5336 transitions. [2021-12-16 22:51:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 22:51:43,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:51:43,746 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:51:43,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 22:51:43,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 22:51:43,964 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:51:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:51:43,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1710261727, now seen corresponding path program 1 times [2021-12-16 22:51:43,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:51:43,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807823691] [2021-12-16 22:51:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:43,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:51:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:51:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:51:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:51:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:51:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:51:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:51:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:51:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:51:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:51:44,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:51:44,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807823691] [2021-12-16 22:51:44,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807823691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:51:44,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513056875] [2021-12-16 22:51:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:44,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:51:44,127 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:51:44,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 22:51:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:51:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:51:44,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:51:44,523 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:51:44,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:51:44,592 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:51:44,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:51:44,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:51:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 22:51:44,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:51:46,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:51:46,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:51:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:51:46,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513056875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:51:46,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:51:46,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2021-12-16 22:51:46,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941174656] [2021-12-16 22:51:46,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:51:46,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-16 22:51:46,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:51:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-16 22:51:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 22:51:46,663 INFO L87 Difference]: Start difference. First operand 3362 states and 5336 transitions. Second operand has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:54:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:54:07,257 INFO L93 Difference]: Finished difference Result 24644 states and 39523 transitions. [2021-12-16 22:54:07,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-12-16 22:54:07,257 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 83 [2021-12-16 22:54:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:54:07,321 INFO L225 Difference]: With dead ends: 24644 [2021-12-16 22:54:07,321 INFO L226 Difference]: Without dead ends: 24642 [2021-12-16 22:54:07,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 164 SyntacticMatches, 14 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17352 ImplicationChecksByTransitivity, 133.7s TimeCoverageRelationStatistics Valid=4982, Invalid=36778, Unknown=60, NotChecked=0, Total=41820 [2021-12-16 22:54:07,331 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 1023 mSDsluCounter, 2818 mSDsCounter, 0 mSdLazyCounter, 7644 mSolverCounterSat, 2959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 11357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2959 IncrementalHoareTripleChecker+Valid, 7644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 754 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:54:07,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 3278 Invalid, 11357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2959 Valid, 7644 Invalid, 0 Unknown, 754 Unchecked, 4.5s Time] [2021-12-16 22:54:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24642 states. [2021-12-16 22:54:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24642 to 5771. [2021-12-16 22:54:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5771 states, 4158 states have (on average 1.4733044733044733) internal successors, (6126), 4180 states have internal predecessors, (6126), 1573 states have call successors, (1573), 39 states have call predecessors, (1573), 39 states have return successors, (1573), 1551 states have call predecessors, (1573), 1573 states have call successors, (1573) [2021-12-16 22:54:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 9272 transitions. [2021-12-16 22:54:08,608 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 9272 transitions. Word has length 83 [2021-12-16 22:54:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:54:08,608 INFO L470 AbstractCegarLoop]: Abstraction has 5771 states and 9272 transitions. [2021-12-16 22:54:08,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:54:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 9272 transitions. [2021-12-16 22:54:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 22:54:08,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:54:08,616 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:54:08,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 22:54:08,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:54:08,832 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:54:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:54:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash 511687486, now seen corresponding path program 1 times [2021-12-16 22:54:08,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:54:08,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742409891] [2021-12-16 22:54:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:54:08,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:54:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:54:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:54:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:54:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:54:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:54:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:54:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:54:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:54:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 22:54:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 22:54:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 22:54:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 22:54:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 22:54:09,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:54:09,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742409891] [2021-12-16 22:54:09,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742409891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:54:09,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23715864] [2021-12-16 22:54:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:54:09,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:54:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:54:09,149 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:54:09,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 22:54:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 22:54:09,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:54:09,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:54:09,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:54:09,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:54:09,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:54:09,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:54:09,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:54:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:54:09,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:54:09,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:54:09,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:54:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:54:09,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:54:09,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:54:10,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:54:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-16 22:54:10,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:54:11,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23715864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:54:11,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:54:11,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-16 22:54:11,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682955598] [2021-12-16 22:54:11,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:54:11,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:54:11,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:54:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:54:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=386, Unknown=1, NotChecked=0, Total=462 [2021-12-16 22:54:11,483 INFO L87 Difference]: Start difference. First operand 5771 states and 9272 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:54:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:54:13,210 INFO L93 Difference]: Finished difference Result 6002 states and 9526 transitions. [2021-12-16 22:54:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 22:54:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 89 [2021-12-16 22:54:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:54:13,222 INFO L225 Difference]: With dead ends: 6002 [2021-12-16 22:54:13,223 INFO L226 Difference]: Without dead ends: 6000 [2021-12-16 22:54:13,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 119 SyntacticMatches, 26 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=279, Invalid=1360, Unknown=1, NotChecked=0, Total=1640 [2021-12-16 22:54:13,226 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 157 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:54:13,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 613 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 726 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2021-12-16 22:54:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2021-12-16 22:54:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 4320. [2021-12-16 22:54:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4320 states, 3108 states have (on average 1.4665379665379665) internal successors, (4558), 3130 states have internal predecessors, (4558), 1171 states have call successors, (1171), 40 states have call predecessors, (1171), 40 states have return successors, (1171), 1149 states have call predecessors, (1171), 1171 states have call successors, (1171) [2021-12-16 22:54:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4320 states to 4320 states and 6900 transitions. [2021-12-16 22:54:14,119 INFO L78 Accepts]: Start accepts. Automaton has 4320 states and 6900 transitions. Word has length 89 [2021-12-16 22:54:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:54:14,119 INFO L470 AbstractCegarLoop]: Abstraction has 4320 states and 6900 transitions. [2021-12-16 22:54:14,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:54:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4320 states and 6900 transitions. [2021-12-16 22:54:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-16 22:54:14,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:54:14,125 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:54:14,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 22:54:14,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:54:14,343 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:54:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:54:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1965057965, now seen corresponding path program 7 times [2021-12-16 22:54:14,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:54:14,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239241525] [2021-12-16 22:54:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:54:14,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:54:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:54:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:54:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:54:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:54:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:54:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:54:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:54:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:54:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:54:14,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:54:14,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239241525] [2021-12-16 22:54:14,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239241525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:54:14,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107032050] [2021-12-16 22:54:14,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:54:14,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:54:14,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:54:14,508 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:54:14,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 22:54:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:14,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 22:54:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:54:14,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:54:14,717 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:54:14,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:54:14,931 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:54:14,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:54:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:54:14,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:54:15,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:54:15,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:54:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:54:15,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107032050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:54:15,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:54:15,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2021-12-16 22:54:15,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742099664] [2021-12-16 22:54:15,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:54:15,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 22:54:15,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:54:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 22:54:15,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:54:15,134 INFO L87 Difference]: Start difference. First operand 4320 states and 6900 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-16 22:54:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:54:36,727 INFO L93 Difference]: Finished difference Result 63118 states and 102063 transitions. [2021-12-16 22:54:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-12-16 22:54:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 87 [2021-12-16 22:54:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:54:36,893 INFO L225 Difference]: With dead ends: 63118 [2021-12-16 22:54:36,894 INFO L226 Difference]: Without dead ends: 63116 [2021-12-16 22:54:36,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37845 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5012, Invalid=80544, Unknown=0, NotChecked=0, Total=85556 [2021-12-16 22:54:36,920 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 442 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 11945 mSolverCounterSat, 2618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 4032 SdHoareTripleChecker+Invalid, 14563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2618 IncrementalHoareTripleChecker+Valid, 11945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:54:36,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 4032 Invalid, 14563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2618 Valid, 11945 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-16 22:54:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63116 states. [2021-12-16 22:54:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63116 to 11510. [2021-12-16 22:54:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11510 states, 8268 states have (on average 1.4813739719400096) internal successors, (12248), 8282 states have internal predecessors, (12248), 3201 states have call successors, (3201), 40 states have call predecessors, (3201), 40 states have return successors, (3201), 3187 states have call predecessors, (3201), 3201 states have call successors, (3201) [2021-12-16 22:54:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 18650 transitions. [2021-12-16 22:54:40,707 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 18650 transitions. Word has length 87 [2021-12-16 22:54:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:54:40,707 INFO L470 AbstractCegarLoop]: Abstraction has 11510 states and 18650 transitions. [2021-12-16 22:54:40,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-16 22:54:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 18650 transitions. [2021-12-16 22:54:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-16 22:54:40,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:54:40,720 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:54:40,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 22:54:40,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-16 22:54:40,937 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:54:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:54:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1305526443, now seen corresponding path program 1 times [2021-12-16 22:54:40,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:54:40,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975666492] [2021-12-16 22:54:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:54:40,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:54:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:54:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:54:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:54:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:54:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:54:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:54:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:54:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:54:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:54:41,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:54:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975666492] [2021-12-16 22:54:41,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975666492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:54:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63513852] [2021-12-16 22:54:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:54:41,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:54:41,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:54:41,156 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:54:41,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 22:54:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:54:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:54:41,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:54:41,538 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:54:41,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:54:41,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:54:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 21 proven. 88 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 22:54:41,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:54:44,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:54:44,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:54:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:54:44,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63513852] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:54:44,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:54:44,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2021-12-16 22:54:44,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956914453] [2021-12-16 22:54:44,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:54:44,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 22:54:44,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:54:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 22:54:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1338, Unknown=1, NotChecked=0, Total=1482 [2021-12-16 22:54:44,257 INFO L87 Difference]: Start difference. First operand 11510 states and 18650 transitions. Second operand has 39 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:57:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:54,707 INFO L93 Difference]: Finished difference Result 53954 states and 87270 transitions. [2021-12-16 22:57:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2021-12-16 22:57:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 87 [2021-12-16 22:57:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:54,829 INFO L225 Difference]: With dead ends: 53954 [2021-12-16 22:57:54,829 INFO L226 Difference]: Without dead ends: 53952 [2021-12-16 22:57:54,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 166 SyntacticMatches, 4 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23490 ImplicationChecksByTransitivity, 176.9s TimeCoverageRelationStatistics Valid=6783, Invalid=50014, Unknown=85, NotChecked=0, Total=56882 [2021-12-16 22:57:54,846 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 1300 mSDsluCounter, 3064 mSDsCounter, 0 mSdLazyCounter, 8960 mSolverCounterSat, 3759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 13330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3759 IncrementalHoareTripleChecker+Valid, 8960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:54,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 3534 Invalid, 13330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3759 Valid, 8960 Invalid, 0 Unknown, 611 Unchecked, 5.0s Time] [2021-12-16 22:57:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53952 states. [2021-12-16 22:57:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53952 to 12254. [2021-12-16 22:57:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12254 states, 8804 states have (on average 1.481599273057701) internal successors, (13044), 8812 states have internal predecessors, (13044), 3401 states have call successors, (3401), 48 states have call predecessors, (3401), 48 states have return successors, (3401), 3393 states have call predecessors, (3401), 3401 states have call successors, (3401) [2021-12-16 22:57:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12254 states to 12254 states and 19846 transitions. [2021-12-16 22:57:58,324 INFO L78 Accepts]: Start accepts. Automaton has 12254 states and 19846 transitions. Word has length 87 [2021-12-16 22:57:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:58,324 INFO L470 AbstractCegarLoop]: Abstraction has 12254 states and 19846 transitions. [2021-12-16 22:57:58,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:57:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 12254 states and 19846 transitions. [2021-12-16 22:57:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 22:57:58,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:58,333 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:58,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:58,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 22:57:58,550 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash 112654004, now seen corresponding path program 2 times [2021-12-16 22:57:58,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:58,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924252709] [2021-12-16 22:57:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:58,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:57:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:57:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:57:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:57:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 22:57:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 22:57:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 22:57:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 22:57:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 22:57:58,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:58,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924252709] [2021-12-16 22:57:58,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924252709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:58,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002970827] [2021-12-16 22:57:58,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:57:58,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:58,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:58,792 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:57:58,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 22:57:58,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:57:58,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:57:58,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 22:57:58,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:58,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:57:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:57:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:57:59,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:57:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:57:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:57:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:57:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:57:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:57:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:59,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:57:59,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:57:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 73 proven. 34 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 22:57:59,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:58:00,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002970827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:58:00,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:58:00,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-16 22:58:00,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044190680] [2021-12-16 22:58:00,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:58:00,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:58:00,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:58:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:58:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=417, Unknown=1, NotChecked=0, Total=506 [2021-12-16 22:58:00,759 INFO L87 Difference]: Start difference. First operand 12254 states and 19846 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:58:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:58:04,254 INFO L93 Difference]: Finished difference Result 15255 states and 24459 transitions. [2021-12-16 22:58:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 22:58:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 93 [2021-12-16 22:58:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:58:04,284 INFO L225 Difference]: With dead ends: 15255 [2021-12-16 22:58:04,285 INFO L226 Difference]: Without dead ends: 15253 [2021-12-16 22:58:04,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 24 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=128, Invalid=573, Unknown=1, NotChecked=0, Total=702 [2021-12-16 22:58:04,291 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 122 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:58:04,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 397 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 377 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-12-16 22:58:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15253 states. [2021-12-16 22:58:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15253 to 13196. [2021-12-16 22:58:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13196 states, 9474 states have (on average 1.4816339455351488) internal successors, (14037), 9483 states have internal predecessors, (14037), 3662 states have call successors, (3662), 59 states have call predecessors, (3662), 59 states have return successors, (3662), 3653 states have call predecessors, (3662), 3662 states have call successors, (3662) [2021-12-16 22:58:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13196 states to 13196 states and 21361 transitions. [2021-12-16 22:58:07,601 INFO L78 Accepts]: Start accepts. Automaton has 13196 states and 21361 transitions. Word has length 93 [2021-12-16 22:58:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:58:07,602 INFO L470 AbstractCegarLoop]: Abstraction has 13196 states and 21361 transitions. [2021-12-16 22:58:07,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:58:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 13196 states and 21361 transitions. [2021-12-16 22:58:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 22:58:07,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:58:07,612 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:58:07,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 22:58:07,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:58:07,828 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:58:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:58:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash -304742602, now seen corresponding path program 1 times [2021-12-16 22:58:07,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:58:07,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817024801] [2021-12-16 22:58:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:58:07,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:58:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:58:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:58:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:58:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:58:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:58:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:58:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:58:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:58:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 22:58:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 22:58:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 22:58:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 22:58:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 22:58:08,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:58:08,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817024801] [2021-12-16 22:58:08,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817024801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:58:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410217179] [2021-12-16 22:58:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:58:08,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:58:08,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:58:08,029 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:58:08,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 22:58:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 22:58:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:58:08,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:58:08,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:58:08,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:58:08,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:58:08,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:58:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:58:08,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:58:08,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:58:08,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:58:08,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:58:08,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:58:08,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:58:08,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:58:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 73 proven. 34 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 22:58:08,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:58:09,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410217179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:58:09,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:58:09,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-16 22:58:09,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692350858] [2021-12-16 22:58:09,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:58:09,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:58:09,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:58:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:58:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=417, Unknown=1, NotChecked=0, Total=506 [2021-12-16 22:58:09,999 INFO L87 Difference]: Start difference. First operand 13196 states and 21361 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:58:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:58:13,491 INFO L93 Difference]: Finished difference Result 13516 states and 21698 transitions. [2021-12-16 22:58:13,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:58:13,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 93 [2021-12-16 22:58:13,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:58:13,515 INFO L225 Difference]: With dead ends: 13516 [2021-12-16 22:58:13,515 INFO L226 Difference]: Without dead ends: 13514 [2021-12-16 22:58:13,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 116 SyntacticMatches, 24 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=246, Invalid=1159, Unknown=1, NotChecked=0, Total=1406 [2021-12-16 22:58:13,520 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 109 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:58:13,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 439 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 601 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-12-16 22:58:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13514 states. [2021-12-16 22:58:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13514 to 6141. [2021-12-16 22:58:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6141 states, 4422 states have (on average 1.4735413839891451) internal successors, (6516), 4427 states have internal predecessors, (6516), 1682 states have call successors, (1682), 36 states have call predecessors, (1682), 36 states have return successors, (1682), 1677 states have call predecessors, (1682), 1682 states have call successors, (1682) [2021-12-16 22:58:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 9880 transitions. [2021-12-16 22:58:16,202 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 9880 transitions. Word has length 93 [2021-12-16 22:58:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:58:16,202 INFO L470 AbstractCegarLoop]: Abstraction has 6141 states and 9880 transitions. [2021-12-16 22:58:16,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 22:58:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 9880 transitions. [2021-12-16 22:58:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 22:58:16,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:58:16,207 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:58:16,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 22:58:16,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:58:16,424 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:58:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:58:16,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1859857993, now seen corresponding path program 8 times [2021-12-16 22:58:16,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:58:16,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883892336] [2021-12-16 22:58:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:58:16,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:58:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:58:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:58:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:58:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:58:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:58:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:58:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:58:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:58:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:58:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:58:16,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:58:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883892336] [2021-12-16 22:58:16,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883892336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:58:16,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146866390] [2021-12-16 22:58:16,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:58:16,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:58:16,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:58:16,567 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:58:16,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 22:58:16,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:58:16,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:58:16,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 22:58:16,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:58:16,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:58:17,028 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:58:17,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:58:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:58:17,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:58:17,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:58:17,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:58:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:58:17,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146866390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:58:17,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:58:17,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 23 [2021-12-16 22:58:17,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619344589] [2021-12-16 22:58:17,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:58:17,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:58:17,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:58:17,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:58:17,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:58:17,245 INFO L87 Difference]: Start difference. First operand 6141 states and 9880 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 22:59:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:10,636 INFO L93 Difference]: Finished difference Result 71553 states and 115542 transitions. [2021-12-16 22:59:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 482 states. [2021-12-16 22:59:10,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2021-12-16 22:59:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:10,801 INFO L225 Difference]: With dead ends: 71553 [2021-12-16 22:59:10,802 INFO L226 Difference]: Without dead ends: 71551 [2021-12-16 22:59:10,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 184 SyntacticMatches, 6 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108646 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10015, Invalid=226667, Unknown=0, NotChecked=0, Total=236682 [2021-12-16 22:59:10,828 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 692 mSDsluCounter, 7733 mSDsCounter, 0 mSdLazyCounter, 24563 mSolverCounterSat, 4927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 9238 SdHoareTripleChecker+Invalid, 29490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4927 IncrementalHoareTripleChecker+Valid, 24563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:10,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 9238 Invalid, 29490 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4927 Valid, 24563 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2021-12-16 22:59:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71551 states. [2021-12-16 22:59:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71551 to 14678. [2021-12-16 22:59:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14678 states, 10534 states have (on average 1.4820580975887603) internal successors, (15612), 10534 states have internal predecessors, (15612), 4107 states have call successors, (4107), 36 states have call predecessors, (4107), 36 states have return successors, (4107), 4107 states have call predecessors, (4107), 4107 states have call successors, (4107) [2021-12-16 22:59:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14678 states to 14678 states and 23826 transitions. [2021-12-16 22:59:18,842 INFO L78 Accepts]: Start accepts. Automaton has 14678 states and 23826 transitions. Word has length 91 [2021-12-16 22:59:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:18,842 INFO L470 AbstractCegarLoop]: Abstraction has 14678 states and 23826 transitions. [2021-12-16 22:59:18,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 22:59:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 14678 states and 23826 transitions. [2021-12-16 22:59:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 22:59:18,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:18,850 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:18,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-16 22:59:19,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-16 22:59:19,066 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1015852491, now seen corresponding path program 1 times [2021-12-16 22:59:19,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:19,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81002490] [2021-12-16 22:59:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:19,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:59:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:59:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:59:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:59:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:59:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:59:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:59:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:59:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:59:19,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:19,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81002490] [2021-12-16 22:59:19,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81002490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:19,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488604375] [2021-12-16 22:59:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:19,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:19,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:19,233 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:19,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 22:59:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:19,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:59:19,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:59:19,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:59:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:59:19,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:20,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:59:20,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:59:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:59:20,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488604375] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:20,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:20,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2021-12-16 22:59:20,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325856240] [2021-12-16 22:59:20,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:20,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 22:59:20,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 22:59:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 22:59:20,355 INFO L87 Difference]: Start difference. First operand 14678 states and 23826 transitions. Second operand has 41 states, 41 states have (on average 4.195121951219512) internal successors, (172), 41 states have internal predecessors, (172), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-16 23:00:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:44,573 INFO L93 Difference]: Finished difference Result 87157 states and 140271 transitions. [2021-12-16 23:00:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 808 states. [2021-12-16 23:00:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.195121951219512) internal successors, (172), 41 states have internal predecessors, (172), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 91 [2021-12-16 23:00:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:44,764 INFO L225 Difference]: With dead ends: 87157 [2021-12-16 23:00:44,765 INFO L226 Difference]: Without dead ends: 87155 [2021-12-16 23:00:44,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 843 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335460 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=42559, Invalid=670621, Unknown=0, NotChecked=0, Total=713180 [2021-12-16 23:00:44,820 INFO L933 BasicCegarLoop]: 1275 mSDtfsCounter, 3065 mSDsluCounter, 4339 mSDsCounter, 0 mSdLazyCounter, 24327 mSolverCounterSat, 15329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 5614 SdHoareTripleChecker+Invalid, 39656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15329 IncrementalHoareTripleChecker+Valid, 24327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-12-16 23:00:44,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 5614 Invalid, 39656 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15329 Valid, 24327 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2021-12-16 23:00:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87155 states. [2021-12-16 23:00:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87155 to 7187. [2021-12-16 23:00:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7187 states, 5212 states have (on average 1.468342287029931) internal successors, (7653), 5217 states have internal predecessors, (7653), 1938 states have call successors, (1938), 36 states have call predecessors, (1938), 36 states have return successors, (1938), 1933 states have call predecessors, (1938), 1938 states have call successors, (1938) [2021-12-16 23:00:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7187 states to 7187 states and 11529 transitions. [2021-12-16 23:00:50,173 INFO L78 Accepts]: Start accepts. Automaton has 7187 states and 11529 transitions. Word has length 91 [2021-12-16 23:00:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:50,173 INFO L470 AbstractCegarLoop]: Abstraction has 7187 states and 11529 transitions. [2021-12-16 23:00:50,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.195121951219512) internal successors, (172), 41 states have internal predecessors, (172), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-16 23:00:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 7187 states and 11529 transitions. [2021-12-16 23:00:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 23:00:50,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:50,180 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:00:50,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:50,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 23:00:50,395 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2139113258, now seen corresponding path program 2 times [2021-12-16 23:00:50,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:50,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122030683] [2021-12-16 23:00:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:50,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 23:00:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 23:00:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:00:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:00:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 23:00:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 23:00:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 23:00:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:00:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 23:00:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 23:00:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 23:00:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 23:00:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 23:00:50,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:50,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122030683] [2021-12-16 23:00:50,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122030683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206656296] [2021-12-16 23:00:50,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:00:50,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:50,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:50,582 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:00:50,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 23:00:50,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:00:50,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-16 23:00:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:50,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 23:00:50,851 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:50,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 23:00:50,931 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:00:50,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:00:50,994 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:00:50,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:00:51,046 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:00:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:00:51,099 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:00:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:00:51,169 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:00:51,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:00:51,215 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:00:51,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:00:51,284 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:00:51,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:00:51,339 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:00:51,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:00:51,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 23:00:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-16 23:00:51,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206656296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:53,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 23:00:53,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-12-16 23:00:53,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423739110] [2021-12-16 23:00:53,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:53,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 23:00:53,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 23:00:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=601, Unknown=1, NotChecked=0, Total=702 [2021-12-16 23:00:53,643 INFO L87 Difference]: Start difference. First operand 7187 states and 11529 transitions. Second operand has 22 states, 22 states have (on average 4.5) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 23:00:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:57,804 INFO L93 Difference]: Finished difference Result 7409 states and 11741 transitions. [2021-12-16 23:00:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 23:00:57,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.5) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 97 [2021-12-16 23:00:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:57,817 INFO L225 Difference]: With dead ends: 7409 [2021-12-16 23:00:57,817 INFO L226 Difference]: Without dead ends: 7407 [2021-12-16 23:00:57,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 20 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=412, Invalid=2343, Unknown=1, NotChecked=0, Total=2756 [2021-12-16 23:00:57,820 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 174 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 23:00:57,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 496 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 672 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2021-12-16 23:00:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7407 states. [2021-12-16 23:01:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7407 to 3492. [2021-12-16 23:01:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 2542 states have (on average 1.450432730133753) internal successors, (3687), 2547 states have internal predecessors, (3687), 914 states have call successors, (914), 35 states have call predecessors, (914), 35 states have return successors, (914), 909 states have call predecessors, (914), 914 states have call successors, (914) [2021-12-16 23:01:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 5515 transitions. [2021-12-16 23:01:00,505 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 5515 transitions. Word has length 97 [2021-12-16 23:01:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:00,506 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 5515 transitions. [2021-12-16 23:01:00,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.5) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 23:01:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 5515 transitions. [2021-12-16 23:01:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 23:01:00,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:00,509 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:00,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:00,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 23:01:00,722 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:00,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash 512678207, now seen corresponding path program 9 times [2021-12-16 23:01:00,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:00,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985393890] [2021-12-16 23:01:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:00,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 23:01:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 23:01:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:01:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:01:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 23:01:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 23:01:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 23:01:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:01:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 99 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 23:01:01,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:01,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985393890] [2021-12-16 23:01:01,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985393890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:01,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880303855] [2021-12-16 23:01:01,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:01:01,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:01,070 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:01:01,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 23:01:01,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 23:01:01,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 23:01:01,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 23:01:02,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 23:01:02,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880303855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:02,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:02,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 46 [2021-12-16 23:01:02,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949046982] [2021-12-16 23:01:02,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:02,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-16 23:01:02,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-16 23:01:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 23:01:02,441 INFO L87 Difference]: Start difference. First operand 3492 states and 5515 transitions. Second operand has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 46 states have internal predecessors, (185), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-16 23:01:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:05,529 INFO L93 Difference]: Finished difference Result 3583 states and 5636 transitions. [2021-12-16 23:01:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 23:01:05,530 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 46 states have internal predecessors, (185), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 95 [2021-12-16 23:01:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:05,535 INFO L225 Difference]: With dead ends: 3583 [2021-12-16 23:01:05,535 INFO L226 Difference]: Without dead ends: 3543 [2021-12-16 23:01:05,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=678, Invalid=2078, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 23:01:05,536 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 311 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:05,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 238 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:01:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2021-12-16 23:01:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3504. [2021-12-16 23:01:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3504 states, 2554 states have (on average 1.4365700861393893) internal successors, (3669), 2556 states have internal predecessors, (3669), 914 states have call successors, (914), 35 states have call predecessors, (914), 35 states have return successors, (914), 912 states have call predecessors, (914), 914 states have call successors, (914) [2021-12-16 23:01:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 5497 transitions. [2021-12-16 23:01:08,305 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 5497 transitions. Word has length 95 [2021-12-16 23:01:08,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:08,305 INFO L470 AbstractCegarLoop]: Abstraction has 3504 states and 5497 transitions. [2021-12-16 23:01:08,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 46 states have internal predecessors, (185), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-16 23:01:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 5497 transitions. [2021-12-16 23:01:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 23:01:08,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:08,309 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:08,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:08,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 23:01:08,531 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1818387086, now seen corresponding path program 1 times [2021-12-16 23:01:08,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:08,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095842403] [2021-12-16 23:01:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:08,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 23:01:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 23:01:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:01:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:01:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 23:01:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 23:01:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 23:01:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:01:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 23:01:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 23:01:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 23:01:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 23:01:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 23:01:08,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:08,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095842403] [2021-12-16 23:01:08,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095842403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:08,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865600918] [2021-12-16 23:01:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:08,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:08,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:08,776 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:01:08,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-16 23:01:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 23:01:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:09,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 23:01:09,158 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:09,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 23:01:09,220 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:09,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 23:01:09,308 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:09,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:01:09,371 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:09,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:01:09,436 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:09,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:01:09,497 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:09,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 23:01:09,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 23:01:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 108 proven. 95 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-16 23:01:09,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:11,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865600918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:11,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 23:01:11,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-12-16 23:01:11,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921080358] [2021-12-16 23:01:11,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:11,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 23:01:11,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 23:01:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1107, Unknown=1, NotChecked=0, Total=1260 [2021-12-16 23:01:11,054 INFO L87 Difference]: Start difference. First operand 3504 states and 5497 transitions. Second operand has 28 states, 28 states have (on average 4.392857142857143) internal successors, (123), 28 states have internal predecessors, (123), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 23:01:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:16,683 INFO L93 Difference]: Finished difference Result 5581 states and 8676 transitions. [2021-12-16 23:01:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-16 23:01:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.392857142857143) internal successors, (123), 28 states have internal predecessors, (123), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 109 [2021-12-16 23:01:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:16,692 INFO L225 Difference]: With dead ends: 5581 [2021-12-16 23:01:16,692 INFO L226 Difference]: Without dead ends: 5579 [2021-12-16 23:01:16,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2638 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=731, Invalid=6578, Unknown=1, NotChecked=0, Total=7310 [2021-12-16 23:01:16,694 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 276 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:16,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1169 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1748 Invalid, 0 Unknown, 157 Unchecked, 0.7s Time] [2021-12-16 23:01:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2021-12-16 23:01:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 3324. [2021-12-16 23:01:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 2428 states have (on average 1.4320428336079079) internal successors, (3477), 2430 states have internal predecessors, (3477), 857 states have call successors, (857), 38 states have call predecessors, (857), 38 states have return successors, (857), 855 states have call predecessors, (857), 857 states have call successors, (857) [2021-12-16 23:01:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 5191 transitions. [2021-12-16 23:01:19,463 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 5191 transitions. Word has length 109 [2021-12-16 23:01:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:19,463 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 5191 transitions. [2021-12-16 23:01:19,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.392857142857143) internal successors, (123), 28 states have internal predecessors, (123), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-16 23:01:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 5191 transitions. [2021-12-16 23:01:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 23:01:19,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:19,467 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:19,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:19,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 23:01:19,684 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:19,684 INFO L85 PathProgramCache]: Analyzing trace with hash -525089814, now seen corresponding path program 10 times [2021-12-16 23:01:19,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:19,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580266631] [2021-12-16 23:01:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:19,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 23:01:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 23:01:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:01:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:01:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 23:01:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 23:01:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 23:01:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:01:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 23:01:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 23:01:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 23:01:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 23:01:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 23:01:19,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:19,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580266631] [2021-12-16 23:01:19,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580266631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:19,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939485524] [2021-12-16 23:01:19,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:01:19,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:19,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:19,876 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:01:19,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-16 23:01:19,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:01:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 23:01:19,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:20,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 23:01:20,151 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:20,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 23:01:20,184 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:20,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 23:01:20,214 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:20,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 23:01:20,513 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:01:20,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 23:01:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 23:01:20,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:20,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 23:01:20,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 23:01:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-16 23:01:20,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939485524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:20,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:20,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2021-12-16 23:01:20,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707609622] [2021-12-16 23:01:20,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:20,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 23:01:20,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 23:01:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-12-16 23:01:20,806 INFO L87 Difference]: Start difference. First operand 3324 states and 5191 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 5 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Killed by 15