./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnifrev.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/rewnifrev.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 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:35:42,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:35:42,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:35:42,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:35:42,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:35:42,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:35:42,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:35:42,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:35:42,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:35:42,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:35:42,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:35:42,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:35:42,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:35:42,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:35:42,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:35:42,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:35:42,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:35:42,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:35:42,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:35:42,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:35:42,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:35:42,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:35:42,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:35:42,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:35:42,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:35:42,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:35:42,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:35:42,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:35:42,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:35:42,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:35:42,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:35:42,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:35:42,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:35:42,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:35:42,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:35:42,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:35:42,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:35:42,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:35:42,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:35:42,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:35:42,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:35:42,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:35:42,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:35:42,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:35:42,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:35:42,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:35:42,836 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:35:42,836 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:35:42,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:35:42,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:35:42,837 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:35:42,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:35:42,838 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:35:42,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:35:42,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:35:42,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:35:42,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:35:42,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:35:42,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:35:42,839 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:35:42,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:35:42,839 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:35:42,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:35:42,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:35:42,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:35:42,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:35:42,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:35:42,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:35:42,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:35:42,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:35:42,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:35:42,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:35:42,842 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:35:42,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:35:42,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:35:42,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:35:42,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed [2021-12-15 21:35:43,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:35:43,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:35:43,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:35:43,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:35:43,020 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:35:43,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnifrev.c [2021-12-15 21:35:43,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5ee05ce/718e49bad5fa46389971af314653a4ab/FLAGc9731d69f [2021-12-15 21:35:43,437 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:35:43,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev.c [2021-12-15 21:35:43,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5ee05ce/718e49bad5fa46389971af314653a4ab/FLAGc9731d69f [2021-12-15 21:35:43,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5ee05ce/718e49bad5fa46389971af314653a4ab [2021-12-15 21:35:43,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:35:43,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:35:43,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:35:43,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:35:43,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:35:43,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31422606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43, skipping insertion in model container [2021-12-15 21:35:43,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:35:43,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:35:43,599 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/rewnifrev.c[400,413] [2021-12-15 21:35:43,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:35:43,616 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:35:43,627 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/rewnifrev.c[400,413] [2021-12-15 21:35:43,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:35:43,648 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:35:43,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43 WrapperNode [2021-12-15 21:35:43,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:35:43,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:35:43,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:35:43,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:35:43,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,669 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2021-12-15 21:35:43,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:35:43,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:35:43,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:35:43,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:35:43,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:35:43,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:35:43,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:35:43,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:35:43,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (1/1) ... [2021-12-15 21:35:43,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:35:43,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:43,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:35:43,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:35:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:35:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:35:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:35:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:35:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:35:43,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:35:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:35:43,794 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:35:43,796 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:35:43,896 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:35:43,900 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:35:43,900 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 21:35:43,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:35:43 BoogieIcfgContainer [2021-12-15 21:35:43,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:35:43,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:35:43,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:35:43,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:35:43,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:35:43" (1/3) ... [2021-12-15 21:35:43,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26746118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:35:43, skipping insertion in model container [2021-12-15 21:35:43,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:35:43" (2/3) ... [2021-12-15 21:35:43,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26746118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:35:43, skipping insertion in model container [2021-12-15 21:35:43,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:35:43" (3/3) ... [2021-12-15 21:35:43,923 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2021-12-15 21:35:43,926 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:35:43,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:35:43,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:35:43,967 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:35:43,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:35:43,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 21:35:43,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:43,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:43,991 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:43,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2021-12-15 21:35:44,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:44,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451140860] [2021-12-15 21:35:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:44,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:44,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:44,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451140860] [2021-12-15 21:35:44,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451140860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:35:44,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:35:44,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:35:44,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835266926] [2021-12-15 21:35:44,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:35:44,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:35:44,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:35:44,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:35:44,177 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:44,197 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-12-15 21:35:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:35:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 21:35:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:44,202 INFO L225 Difference]: With dead ends: 29 [2021-12-15 21:35:44,203 INFO L226 Difference]: Without dead ends: 14 [2021-12-15 21:35:44,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:35:44,207 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:44,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:35:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-15 21:35:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-15 21:35:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-15 21:35:44,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-15 21:35:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:44,228 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-15 21:35:44,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-15 21:35:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 21:35:44,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:44,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:44,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:35:44,230 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2021-12-15 21:35:44,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:44,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377292214] [2021-12-15 21:35:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:44,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:44,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:44,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377292214] [2021-12-15 21:35:44,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377292214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:35:44,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:35:44,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:35:44,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024478534] [2021-12-15 21:35:44,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:35:44,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:35:44,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:35:44,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:35:44,299 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:44,330 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-15 21:35:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:35:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 21:35:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:44,333 INFO L225 Difference]: With dead ends: 29 [2021-12-15 21:35:44,333 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 21:35:44,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:35:44,334 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:44,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:35:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 21:35:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-12-15 21:35:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-15 21:35:44,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-12-15 21:35:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:44,341 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-15 21:35:44,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-15 21:35:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 21:35:44,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:44,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:44,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:35:44,345 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:44,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:44,346 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2021-12-15 21:35:44,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:44,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037665425] [2021-12-15 21:35:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:44,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:44,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:44,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037665425] [2021-12-15 21:35:44,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037665425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:35:44,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:35:44,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:35:44,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269795065] [2021-12-15 21:35:44,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:35:44,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:35:44,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:35:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:35:44,407 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:44,480 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-12-15 21:35:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:35:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 21:35:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:44,481 INFO L225 Difference]: With dead ends: 32 [2021-12-15 21:35:44,482 INFO L226 Difference]: Without dead ends: 25 [2021-12-15 21:35:44,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:35:44,484 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:44,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:35:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-15 21:35:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-12-15 21:35:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-15 21:35:44,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-12-15 21:35:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:44,491 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-15 21:35:44,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-15 21:35:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 21:35:44,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:44,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:44,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 21:35:44,493 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2021-12-15 21:35:44,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:44,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582956100] [2021-12-15 21:35:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:44,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:35:44,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582956100] [2021-12-15 21:35:44,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582956100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:35:44,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:35:44,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 21:35:44,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231363856] [2021-12-15 21:35:44,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:35:44,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 21:35:44,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 21:35:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:35:44,722 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:44,815 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-12-15 21:35:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 21:35:44,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 21:35:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:44,816 INFO L225 Difference]: With dead ends: 27 [2021-12-15 21:35:44,816 INFO L226 Difference]: Without dead ends: 25 [2021-12-15 21:35:44,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:35:44,817 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:44,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:35:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-15 21:35:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-15 21:35:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-15 21:35:44,820 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-12-15 21:35:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:44,820 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-15 21:35:44,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-15 21:35:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 21:35:44,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:44,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:44,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 21:35:44,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2021-12-15 21:35:44,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:44,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158893489] [2021-12-15 21:35:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:44,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:45,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:45,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158893489] [2021-12-15 21:35:45,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158893489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:45,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940762838] [2021-12-15 21:35:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:45,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:45,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:45,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:35:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 21:35:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:35:45,317 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:35:45,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:35:45,408 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-15 21:35:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2021-12-15 21:35:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:45,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:49,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-12-15 21:35:49,597 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 82 treesize of output 78 [2021-12-15 21:35:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:49,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940762838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:49,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:49,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2021-12-15 21:35:49,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881546607] [2021-12-15 21:35:49,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:49,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 21:35:49,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 21:35:49,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=323, Unknown=2, NotChecked=0, Total=420 [2021-12-15 21:35:49,646 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:51,873 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-15 21:35:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 21:35:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 21:35:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:51,880 INFO L225 Difference]: With dead ends: 35 [2021-12-15 21:35:51,880 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 21:35:51,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=247, Invalid=806, Unknown=3, NotChecked=0, Total=1056 [2021-12-15 21:35:51,883 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:51,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 41 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 105 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2021-12-15 21:35:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 21:35:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-12-15 21:35:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-12-15 21:35:51,890 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2021-12-15 21:35:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:51,891 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-12-15 21:35:51,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-12-15 21:35:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:35:51,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:51,892 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:51,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 21:35:52,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:52,108 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2021-12-15 21:35:52,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:52,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789704505] [2021-12-15 21:35:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:52,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:52,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:52,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789704505] [2021-12-15 21:35:52,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789704505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928048635] [2021-12-15 21:35:52,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:35:52,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:52,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:52,172 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:52,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:35:52,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:35:52,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 21:35:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:52,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:52,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928048635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:52,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:52,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2021-12-15 21:35:52,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001565133] [2021-12-15 21:35:52,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:52,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 21:35:52,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:52,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 21:35:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:35:52,364 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:52,421 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-12-15 21:35:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:35:52,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 21:35:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:52,422 INFO L225 Difference]: With dead ends: 56 [2021-12-15 21:35:52,422 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 21:35:52,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-12-15 21:35:52,423 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:52,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:35:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 21:35:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-12-15 21:35:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-15 21:35:52,426 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-12-15 21:35:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:52,427 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-15 21:35:52,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-15 21:35:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 21:35:52,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:52,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:52,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 21:35:52,643 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,SelfDestructingSolverStorable5 [2021-12-15 21:35:52,644 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2021-12-15 21:35:52,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:52,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059614895] [2021-12-15 21:35:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:52,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:52,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:52,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059614895] [2021-12-15 21:35:52,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059614895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:52,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808573053] [2021-12-15 21:35:52,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:35:52,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:52,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:52,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:35:52,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 21:35:52,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:52,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 21:35:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:52,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:35:52,992 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:35:52,993 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 31 treesize of output 30 [2021-12-15 21:35:53,005 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:35:53,005 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 [2021-12-15 21:35:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:53,060 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 [2021-12-15 21:35:53,162 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 [2021-12-15 21:35:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:53,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:53,403 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 24 treesize of output 22 [2021-12-15 21:35:53,406 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 86 treesize of output 82 [2021-12-15 21:35:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:53,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808573053] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:53,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:53,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2021-12-15 21:35:53,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141055146] [2021-12-15 21:35:53,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:53,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 21:35:53,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 21:35:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-15 21:35:53,426 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:53,889 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-12-15 21:35:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 21:35:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-15 21:35:53,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:53,904 INFO L225 Difference]: With dead ends: 46 [2021-12-15 21:35:53,904 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 21:35:53,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=552, Invalid=1704, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 21:35:53,905 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:53,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 69 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 208 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-12-15 21:35:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 21:35:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2021-12-15 21:35:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-15 21:35:53,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2021-12-15 21:35:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:53,909 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-15 21:35:53,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-15 21:35:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 21:35:53,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:53,910 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:53,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:54,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:54,124 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:54,124 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 4 times [2021-12-15 21:35:54,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:54,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698204112] [2021-12-15 21:35:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:54,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:54,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:54,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698204112] [2021-12-15 21:35:54,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698204112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:54,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231000542] [2021-12-15 21:35:54,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:35:54,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:54,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:54,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:54,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:35:54,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:35:54,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:54,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 21:35:54,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:54,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:54,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231000542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:54,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:54,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 15 [2021-12-15 21:35:54,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716851482] [2021-12-15 21:35:54,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:54,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 21:35:54,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:54,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 21:35:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-12-15 21:35:54,415 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:54,479 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-12-15 21:35:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:35:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-15 21:35:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:54,480 INFO L225 Difference]: With dead ends: 68 [2021-12-15 21:35:54,480 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 21:35:54,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-12-15 21:35:54,481 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:54,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:35:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 21:35:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-12-15 21:35:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-12-15 21:35:54,485 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2021-12-15 21:35:54,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:54,485 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-12-15 21:35:54,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-12-15 21:35:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 21:35:54,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:54,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:54,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:54,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:54,700 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 5 times [2021-12-15 21:35:54,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:54,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705151788] [2021-12-15 21:35:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:54,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:55,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:55,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705151788] [2021-12-15 21:35:55,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705151788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:55,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791594095] [2021-12-15 21:35:55,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:35:55,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:55,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:55,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:55,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:35:55,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 21:35:55,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-15 21:35:55,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:55,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:35:55,113 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:35:55,114 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 31 treesize of output 30 [2021-12-15 21:35:55,129 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:35:55,129 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 [2021-12-15 21:35:55,159 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:35:55,160 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 31 treesize of output 30 [2021-12-15 21:35:55,175 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:35:55,175 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 [2021-12-15 21:35:55,224 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 19 treesize of output 18 [2021-12-15 21:35:55,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:35:55,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:35:55,333 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 17 treesize of output 10 [2021-12-15 21:35:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:55,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:55,724 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 24 treesize of output 22 [2021-12-15 21:35:55,733 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 86 treesize of output 82 [2021-12-15 21:35:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:55,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791594095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:55,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:55,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2021-12-15 21:35:55,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602639196] [2021-12-15 21:35:55,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:55,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 21:35:55,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 21:35:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-12-15 21:35:55,768 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:56,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:56,280 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-12-15 21:35:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-15 21:35:56,281 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-15 21:35:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:56,281 INFO L225 Difference]: With dead ends: 55 [2021-12-15 21:35:56,281 INFO L226 Difference]: Without dead ends: 53 [2021-12-15 21:35:56,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=688, Invalid=2174, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 21:35:56,283 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:56,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 81 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 275 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-12-15 21:35:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-15 21:35:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-12-15 21:35:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-12-15 21:35:56,286 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2021-12-15 21:35:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:56,286 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-12-15 21:35:56,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-12-15 21:35:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 21:35:56,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:56,287 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:56,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:56,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:56,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 6 times [2021-12-15 21:35:56,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:56,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114177865] [2021-12-15 21:35:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:56,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:56,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:56,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114177865] [2021-12-15 21:35:56,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114177865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:56,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656138955] [2021-12-15 21:35:56,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:35:56,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:56,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:56,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:56,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:35:56,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 21:35:56,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 21:35:56,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:56,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:56,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656138955] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:56,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:56,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 18 [2021-12-15 21:35:56,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858203554] [2021-12-15 21:35:56,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:56,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 21:35:56,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:56,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 21:35:56,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-12-15 21:35:56,932 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:57,034 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-12-15 21:35:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 21:35:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 21:35:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:57,036 INFO L225 Difference]: With dead ends: 80 [2021-12-15 21:35:57,036 INFO L226 Difference]: Without dead ends: 47 [2021-12-15 21:35:57,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:35:57,037 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:57,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:35:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-15 21:35:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-15 21:35:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-15 21:35:57,041 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2021-12-15 21:35:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:57,041 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-15 21:35:57,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-15 21:35:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 21:35:57,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:57,042 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:57,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:57,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:57,244 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 7 times [2021-12-15 21:35:57,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044919119] [2021-12-15 21:35:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:57,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:57,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:57,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044919119] [2021-12-15 21:35:57,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044919119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:57,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962400193] [2021-12-15 21:35:57,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:35:57,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:57,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:57,490 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:57,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:35:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:57,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 21:35:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:57,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:35:57,602 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:35:57,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:35:57,611 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:35:57,611 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 [2021-12-15 21:35:57,654 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:35:57,654 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 31 treesize of output 30 [2021-12-15 21:35:57,666 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:35:57,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-15 21:35:57,703 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:35:57,703 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 31 treesize of output 30 [2021-12-15 21:35:57,720 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:35:57,721 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 [2021-12-15 21:35:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:57,810 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 [2021-12-15 21:35:58,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:35:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:58,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:58,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-15 21:35:58,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-15 21:35:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:58,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962400193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:58,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:58,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 33 [2021-12-15 21:35:58,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383880616] [2021-12-15 21:35:58,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:58,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 21:35:58,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 21:35:58,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:35:58,479 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:59,191 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-12-15 21:35:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-15 21:35:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-15 21:35:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:59,192 INFO L225 Difference]: With dead ends: 63 [2021-12-15 21:35:59,192 INFO L226 Difference]: Without dead ends: 61 [2021-12-15 21:35:59,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=736, Invalid=2686, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 21:35:59,193 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 106 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:59,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 119 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 334 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2021-12-15 21:35:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-15 21:35:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-12-15 21:35:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-12-15 21:35:59,197 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2021-12-15 21:35:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:59,197 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-12-15 21:35:59,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-12-15 21:35:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 21:35:59,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:59,197 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:59,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:59,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:59,414 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 8 times [2021-12-15 21:35:59,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:59,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695418743] [2021-12-15 21:35:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:59,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:59,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695418743] [2021-12-15 21:35:59,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695418743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362901404] [2021-12-15 21:35:59,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:35:59,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:59,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:59,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:59,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:35:59,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:35:59,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 21:35:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:59,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:59,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362901404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:59,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:59,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 21 [2021-12-15 21:35:59,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128290364] [2021-12-15 21:35:59,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:59,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 21:35:59,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 21:35:59,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2021-12-15 21:35:59,828 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:59,910 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-12-15 21:35:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 21:35:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-15 21:35:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:59,911 INFO L225 Difference]: With dead ends: 92 [2021-12-15 21:35:59,911 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 21:35:59,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2021-12-15 21:35:59,911 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:59,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 72 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:35:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 21:35:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-12-15 21:35:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-12-15 21:35:59,915 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2021-12-15 21:35:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:59,915 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-12-15 21:35:59,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-12-15 21:35:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 21:35:59,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:59,915 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:59,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:00,123 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,SelfDestructingSolverStorable11 [2021-12-15 21:36:00,123 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 9 times [2021-12-15 21:36:00,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:00,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600992105] [2021-12-15 21:36:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:00,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 26 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:00,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:00,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600992105] [2021-12-15 21:36:00,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600992105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:00,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099927538] [2021-12-15 21:36:00,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:36:00,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:00,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:00,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:00,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:36:00,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 21:36:00,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:00,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-15 21:36:00,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:00,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:00,695 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:00,695 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 31 treesize of output 30 [2021-12-15 21:36:00,704 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:00,704 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 [2021-12-15 21:36:00,724 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:00,732 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:00,733 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 [2021-12-15 21:36:00,752 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:00,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:00,761 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:00,761 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 [2021-12-15 21:36:00,784 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:00,784 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 31 treesize of output 30 [2021-12-15 21:36:00,793 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:00,793 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 [2021-12-15 21:36:00,855 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:00,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:36:01,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-15 21:36:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:01,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:01,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099927538] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:01,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:01,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 43 [2021-12-15 21:36:01,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219921973] [2021-12-15 21:36:01,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:01,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-15 21:36:01,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-15 21:36:01,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 21:36:01,625 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:02,573 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2021-12-15 21:36:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-15 21:36:02,574 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-15 21:36:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:02,574 INFO L225 Difference]: With dead ends: 80 [2021-12-15 21:36:02,574 INFO L226 Difference]: Without dead ends: 78 [2021-12-15 21:36:02,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1054, Invalid=4496, Unknown=0, NotChecked=0, Total=5550 [2021-12-15 21:36:02,576 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 248 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:02,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 196 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 370 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2021-12-15 21:36:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-15 21:36:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2021-12-15 21:36:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-12-15 21:36:02,579 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2021-12-15 21:36:02,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:02,579 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-12-15 21:36:02,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-12-15 21:36:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 21:36:02,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:02,580 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:02,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:02,782 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,SelfDestructingSolverStorable12 [2021-12-15 21:36:02,782 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:02,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 10 times [2021-12-15 21:36:02,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:02,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760958878] [2021-12-15 21:36:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:02,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:02,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:02,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760958878] [2021-12-15 21:36:02,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760958878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:02,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96813012] [2021-12-15 21:36:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:36:02,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:02,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:02,877 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:02,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 21:36:02,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:36:02,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:02,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 21:36:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:03,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 88 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:03,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96813012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:03,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:03,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 24 [2021-12-15 21:36:03,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058751102] [2021-12-15 21:36:03,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:03,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 21:36:03,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:03,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 21:36:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-12-15 21:36:03,277 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:03,396 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-12-15 21:36:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 21:36:03,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-15 21:36:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:03,398 INFO L225 Difference]: With dead ends: 104 [2021-12-15 21:36:03,398 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 21:36:03,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:36:03,398 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:03,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 90 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:36:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 21:36:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-12-15 21:36:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-12-15 21:36:03,407 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2021-12-15 21:36:03,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:03,407 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-12-15 21:36:03,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:03,407 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-12-15 21:36:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 21:36:03,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:03,408 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:03,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:03,623 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,SelfDestructingSolverStorable13 [2021-12-15 21:36:03,623 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 11 times [2021-12-15 21:36:03,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:03,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545592329] [2021-12-15 21:36:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:03,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 29 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:04,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:04,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545592329] [2021-12-15 21:36:04,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545592329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:04,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916628372] [2021-12-15 21:36:04,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:36:04,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:04,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:04,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 21:36:04,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-15 21:36:04,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:04,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-15 21:36:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:04,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:04,198 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:04,198 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 31 treesize of output 30 [2021-12-15 21:36:04,206 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:04,206 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 [2021-12-15 21:36:04,227 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:04,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:04,235 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:04,235 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 [2021-12-15 21:36:04,264 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:04,264 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 31 treesize of output 30 [2021-12-15 21:36:04,272 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:04,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:36:04,291 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:04,291 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 31 treesize of output 30 [2021-12-15 21:36:04,299 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:04,299 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 [2021-12-15 21:36:04,327 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:04,328 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 31 treesize of output 30 [2021-12-15 21:36:04,335 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:04,335 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 [2021-12-15 21:36:04,377 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:04,377 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 [2021-12-15 21:36:04,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-15 21:36:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:04,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 36 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:05,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916628372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:05,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:05,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 46 [2021-12-15 21:36:05,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552780448] [2021-12-15 21:36:05,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:05,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-15 21:36:05,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-15 21:36:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1764, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 21:36:05,274 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 46 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 46 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:06,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:06,390 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-12-15 21:36:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-15 21:36:06,391 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 46 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-15 21:36:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:06,391 INFO L225 Difference]: With dead ends: 78 [2021-12-15 21:36:06,391 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 21:36:06,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 106 SyntacticMatches, 13 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2329 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1305, Invalid=5337, Unknown=0, NotChecked=0, Total=6642 [2021-12-15 21:36:06,393 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 208 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:06,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 224 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 452 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2021-12-15 21:36:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 21:36:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2021-12-15 21:36:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:06,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-12-15 21:36:06,396 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2021-12-15 21:36:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:06,397 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-12-15 21:36:06,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 46 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-12-15 21:36:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 21:36:06,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:06,397 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:06,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-15 21:36:06,607 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,SelfDestructingSolverStorable14 [2021-12-15 21:36:06,607 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:06,608 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 12 times [2021-12-15 21:36:06,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:06,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324389997] [2021-12-15 21:36:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:06,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:06,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:06,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324389997] [2021-12-15 21:36:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324389997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:06,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544382419] [2021-12-15 21:36:06,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:36:06,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:06,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:06,692 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:06,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 21:36:06,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-15 21:36:06,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 21:36:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:07,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:07,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544382419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:07,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:07,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 27 [2021-12-15 21:36:07,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135383487] [2021-12-15 21:36:07,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:07,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 21:36:07,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 21:36:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2021-12-15 21:36:07,222 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:07,334 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-12-15 21:36:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 21:36:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 21:36:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:07,335 INFO L225 Difference]: With dead ends: 116 [2021-12-15 21:36:07,335 INFO L226 Difference]: Without dead ends: 71 [2021-12-15 21:36:07,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2021-12-15 21:36:07,336 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:07,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 92 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:36:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-15 21:36:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-12-15 21:36:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-12-15 21:36:07,339 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2021-12-15 21:36:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:07,339 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-12-15 21:36:07,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-12-15 21:36:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 21:36:07,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:07,340 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:07,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:07,555 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,SelfDestructingSolverStorable15 [2021-12-15 21:36:07,555 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 13 times [2021-12-15 21:36:07,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:07,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246228078] [2021-12-15 21:36:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:07,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 24 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:07,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:07,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246228078] [2021-12-15 21:36:07,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246228078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:07,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950602756] [2021-12-15 21:36:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:36:07,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:07,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:07,883 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:07,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 21:36:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-15 21:36:07,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:07,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:08,012 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:08,012 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 31 treesize of output 30 [2021-12-15 21:36:08,021 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:08,021 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 [2021-12-15 21:36:08,042 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:08,043 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 31 treesize of output 30 [2021-12-15 21:36:08,059 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:08,060 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 [2021-12-15 21:36:08,103 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:08,103 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 31 treesize of output 30 [2021-12-15 21:36:08,113 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:08,113 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 [2021-12-15 21:36:08,136 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:08,136 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 31 treesize of output 30 [2021-12-15 21:36:08,144 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:08,144 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 [2021-12-15 21:36:08,167 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:08,167 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 31 treesize of output 30 [2021-12-15 21:36:08,175 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:08,176 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 [2021-12-15 21:36:08,199 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:08,199 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 31 treesize of output 30 [2021-12-15 21:36:08,207 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:08,208 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 [2021-12-15 21:36:08,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:36:08,261 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 [2021-12-15 21:36:08,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:36:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:08,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 42 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:09,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950602756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:09,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:09,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 44 [2021-12-15 21:36:09,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880118505] [2021-12-15 21:36:09,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:09,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-15 21:36:09,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-15 21:36:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 21:36:09,035 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 44 states, 44 states have (on average 3.75) internal successors, (165), 44 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:10,100 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-12-15 21:36:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-15 21:36:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.75) internal successors, (165), 44 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 21:36:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:10,101 INFO L225 Difference]: With dead ends: 87 [2021-12-15 21:36:10,101 INFO L226 Difference]: Without dead ends: 85 [2021-12-15 21:36:10,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 122 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1293, Invalid=5349, Unknown=0, NotChecked=0, Total=6642 [2021-12-15 21:36:10,103 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 246 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:10,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 334 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 772 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2021-12-15 21:36:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-15 21:36:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-12-15 21:36:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-12-15 21:36:10,110 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2021-12-15 21:36:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:10,111 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-12-15 21:36:10,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.75) internal successors, (165), 44 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-12-15 21:36:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 21:36:10,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:10,113 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:10,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-15 21:36:10,327 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,SelfDestructingSolverStorable16 [2021-12-15 21:36:10,327 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 14 times [2021-12-15 21:36:10,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:10,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256925135] [2021-12-15 21:36:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:10,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:10,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256925135] [2021-12-15 21:36:10,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256925135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911347788] [2021-12-15 21:36:10,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:36:10,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:10,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:10,438 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:10,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 21:36:10,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:36:10,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:10,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 21:36:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:10,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 150 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:11,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911347788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:11,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:11,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 30 [2021-12-15 21:36:11,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653194193] [2021-12-15 21:36:11,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:11,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 21:36:11,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 21:36:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=524, Unknown=0, NotChecked=0, Total=870 [2021-12-15 21:36:11,058 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:11,188 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2021-12-15 21:36:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 21:36:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 21:36:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:11,188 INFO L225 Difference]: With dead ends: 128 [2021-12-15 21:36:11,188 INFO L226 Difference]: Without dead ends: 79 [2021-12-15 21:36:11,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=368, Invalid=562, Unknown=0, NotChecked=0, Total=930 [2021-12-15 21:36:11,189 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:11,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 116 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:36:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-15 21:36:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-12-15 21:36:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-12-15 21:36:11,192 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 72 [2021-12-15 21:36:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:11,193 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-12-15 21:36:11,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-12-15 21:36:11,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 21:36:11,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:11,193 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:11,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:11,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:11,394 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 15 times [2021-12-15 21:36:11,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:11,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818102124] [2021-12-15 21:36:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:11,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:11,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:11,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818102124] [2021-12-15 21:36:11,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818102124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:11,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508155430] [2021-12-15 21:36:11,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:36:11,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:11,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:11,672 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:11,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 21:36:11,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-15 21:36:11,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:11,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-15 21:36:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:11,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:11,895 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:11,895 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 31 treesize of output 30 [2021-12-15 21:36:11,905 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:11,906 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 [2021-12-15 21:36:11,919 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:11,920 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 31 treesize of output 30 [2021-12-15 21:36:11,931 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:11,931 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 30 treesize of output 29 [2021-12-15 21:36:11,953 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:11,953 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 31 treesize of output 30 [2021-12-15 21:36:11,963 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:11,963 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 [2021-12-15 21:36:11,977 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:11,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:11,988 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:11,988 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 [2021-12-15 21:36:12,004 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:12,004 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 31 treesize of output 30 [2021-12-15 21:36:12,022 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:12,022 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 [2021-12-15 21:36:12,038 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:12,039 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 31 treesize of output 30 [2021-12-15 21:36:12,052 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:12,052 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 [2021-12-15 21:36:12,066 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:12,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:12,077 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:12,077 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 [2021-12-15 21:36:12,136 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-15 21:36:12,136 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 21 treesize of output 20 [2021-12-15 21:36:12,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:36:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:12,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 48 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:13,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508155430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:13,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:13,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 24] total 37 [2021-12-15 21:36:13,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423696283] [2021-12-15 21:36:13,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:13,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-15 21:36:13,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-15 21:36:13,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 21:36:13,185 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:14,559 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-15 21:36:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-15 21:36:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 21:36:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:14,560 INFO L225 Difference]: With dead ends: 95 [2021-12-15 21:36:14,560 INFO L226 Difference]: Without dead ends: 93 [2021-12-15 21:36:14,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 142 SyntacticMatches, 18 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1295, Invalid=5185, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 21:36:14,561 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 174 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:14,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 277 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 21:36:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-15 21:36:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-12-15 21:36:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-12-15 21:36:14,565 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 76 [2021-12-15 21:36:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:14,565 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-12-15 21:36:14,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-12-15 21:36:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 21:36:14,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:14,565 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:14,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-15 21:36:14,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:14,766 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2057478922, now seen corresponding path program 16 times [2021-12-15 21:36:14,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:14,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149176892] [2021-12-15 21:36:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:14,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:14,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149176892] [2021-12-15 21:36:14,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149176892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261081766] [2021-12-15 21:36:14,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:36:14,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:14,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:14,897 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:14,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 21:36:14,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:36:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 21:36:14,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:15,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 187 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:15,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261081766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:15,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:15,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 22] total 33 [2021-12-15 21:36:15,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707728206] [2021-12-15 21:36:15,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:15,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 21:36:15,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:15,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 21:36:15,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:36:15,490 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:15,656 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2021-12-15 21:36:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 21:36:15,657 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-15 21:36:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:15,657 INFO L225 Difference]: With dead ends: 140 [2021-12-15 21:36:15,657 INFO L226 Difference]: Without dead ends: 87 [2021-12-15 21:36:15,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=679, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 21:36:15,658 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:15,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 128 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:36:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-15 21:36:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-12-15 21:36:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-12-15 21:36:15,664 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2021-12-15 21:36:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:15,664 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-12-15 21:36:15,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-12-15 21:36:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 21:36:15,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:15,669 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:15,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-15 21:36:15,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:15,883 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 17 times [2021-12-15 21:36:15,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:15,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438453422] [2021-12-15 21:36:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:15,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 28 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:16,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438453422] [2021-12-15 21:36:16,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438453422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481526864] [2021-12-15 21:36:16,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:36:16,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:16,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:16,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:16,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 21:36:16,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-15 21:36:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:16,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-15 21:36:16,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:16,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:16,510 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:16,510 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 31 treesize of output 30 [2021-12-15 21:36:16,522 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:16,522 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 [2021-12-15 21:36:16,555 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:16,555 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 31 treesize of output 30 [2021-12-15 21:36:16,565 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:16,565 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 [2021-12-15 21:36:16,614 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:16,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:16,625 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:16,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:36:16,659 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:16,659 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 31 treesize of output 30 [2021-12-15 21:36:16,670 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:16,670 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 [2021-12-15 21:36:16,705 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:16,705 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 31 treesize of output 30 [2021-12-15 21:36:16,716 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:16,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:36:16,751 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:16,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:16,764 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:16,764 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 [2021-12-15 21:36:16,800 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:16,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:16,811 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:16,811 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 [2021-12-15 21:36:16,849 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:16,849 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 31 treesize of output 30 [2021-12-15 21:36:16,860 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:16,860 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 [2021-12-15 21:36:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:36:16,976 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 [2021-12-15 21:36:17,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:36:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 28 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:17,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:18,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-15 21:36:18,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-15 21:36:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 54 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:18,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481526864] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:18,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:18,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 54 [2021-12-15 21:36:18,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618568108] [2021-12-15 21:36:18,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:18,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-15 21:36:18,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-15 21:36:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 21:36:18,209 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 54 states, 54 states have (on average 3.8333333333333335) internal successors, (207), 54 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:19,923 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2021-12-15 21:36:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-15 21:36:19,924 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.8333333333333335) internal successors, (207), 54 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-15 21:36:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:19,924 INFO L225 Difference]: With dead ends: 103 [2021-12-15 21:36:19,924 INFO L226 Difference]: Without dead ends: 101 [2021-12-15 21:36:19,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 152 SyntacticMatches, 25 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1966, Invalid=8540, Unknown=0, NotChecked=0, Total=10506 [2021-12-15 21:36:19,926 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:19,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 389 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1152 Invalid, 0 Unknown, 69 Unchecked, 0.5s Time] [2021-12-15 21:36:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-15 21:36:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2021-12-15 21:36:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-12-15 21:36:19,930 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 84 [2021-12-15 21:36:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:19,930 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-12-15 21:36:19,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.8333333333333335) internal successors, (207), 54 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-12-15 21:36:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 21:36:19,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:19,931 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:19,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:20,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:20,140 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 18 times [2021-12-15 21:36:20,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:20,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303865914] [2021-12-15 21:36:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:20,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:20,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303865914] [2021-12-15 21:36:20,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303865914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599819562] [2021-12-15 21:36:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:36:20,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:20,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:20,246 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:20,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 21:36:20,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-15 21:36:20,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 21:36:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:20,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 228 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:21,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599819562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:21,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:21,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 24] total 36 [2021-12-15 21:36:21,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994753569] [2021-12-15 21:36:21,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:21,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-15 21:36:21,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:21,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-15 21:36:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=761, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 21:36:21,194 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:21,324 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2021-12-15 21:36:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-15 21:36:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-15 21:36:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:21,325 INFO L225 Difference]: With dead ends: 152 [2021-12-15 21:36:21,325 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 21:36:21,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=807, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 21:36:21,326 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:21,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 140 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:36:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 21:36:21,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-12-15 21:36:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-12-15 21:36:21,330 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 88 [2021-12-15 21:36:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:21,330 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-12-15 21:36:21,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-12-15 21:36:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 21:36:21,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:21,330 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:21,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-15 21:36:21,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:21,539 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 19 times [2021-12-15 21:36:21,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:21,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501474317] [2021-12-15 21:36:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:21,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:21,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501474317] [2021-12-15 21:36:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501474317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748455045] [2021-12-15 21:36:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:36:21,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:21,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:21,899 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:21,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 21:36:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-15 21:36:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:22,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:22,079 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,079 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 31 treesize of output 30 [2021-12-15 21:36:22,089 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,089 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 [2021-12-15 21:36:22,124 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,125 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 31 treesize of output 30 [2021-12-15 21:36:22,152 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,152 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 [2021-12-15 21:36:22,187 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,187 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 31 treesize of output 30 [2021-12-15 21:36:22,198 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,198 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 [2021-12-15 21:36:22,233 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,233 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 31 treesize of output 30 [2021-12-15 21:36:22,247 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,248 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 [2021-12-15 21:36:22,274 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,274 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 31 treesize of output 30 [2021-12-15 21:36:22,282 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,283 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 [2021-12-15 21:36:22,309 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,309 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 31 treesize of output 30 [2021-12-15 21:36:22,317 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,318 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 [2021-12-15 21:36:22,345 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,345 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 31 treesize of output 30 [2021-12-15 21:36:22,357 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,357 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 [2021-12-15 21:36:22,390 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,390 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 31 treesize of output 30 [2021-12-15 21:36:22,398 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,398 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 [2021-12-15 21:36:22,439 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:22,439 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 31 treesize of output 30 [2021-12-15 21:36:22,451 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:22,451 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 [2021-12-15 21:36:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:36:22,521 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 [2021-12-15 21:36:23,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:36:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:23,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:24,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-15 21:36:24,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-15 21:36:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 60 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:24,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748455045] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:24,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:24,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 28] total 58 [2021-12-15 21:36:24,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796236579] [2021-12-15 21:36:24,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:24,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-15 21:36:24,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:24,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-15 21:36:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2858, Unknown=0, NotChecked=0, Total=3306 [2021-12-15 21:36:24,242 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 58 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:26,226 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2021-12-15 21:36:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-15 21:36:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 58 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-15 21:36:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:26,227 INFO L225 Difference]: With dead ends: 111 [2021-12-15 21:36:26,227 INFO L226 Difference]: Without dead ends: 109 [2021-12-15 21:36:26,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 168 SyntacticMatches, 27 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4231 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2252, Invalid=9958, Unknown=0, NotChecked=0, Total=12210 [2021-12-15 21:36:26,228 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 220 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:26,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 412 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1313 Invalid, 0 Unknown, 41 Unchecked, 0.5s Time] [2021-12-15 21:36:26,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-15 21:36:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2021-12-15 21:36:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-12-15 21:36:26,233 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2021-12-15 21:36:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:26,233 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-12-15 21:36:26,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 58 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-12-15 21:36:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 21:36:26,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:26,233 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:26,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:26,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:26,447 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 20 times [2021-12-15 21:36:26,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:26,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124981149] [2021-12-15 21:36:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:26,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:26,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:26,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124981149] [2021-12-15 21:36:26,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124981149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:26,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425158754] [2021-12-15 21:36:26,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:36:26,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:26,565 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:26,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 21:36:26,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:36:26,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 21:36:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:26,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 273 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:27,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425158754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:27,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:27,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 26] total 39 [2021-12-15 21:36:27,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133906294] [2021-12-15 21:36:27,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:27,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 21:36:27,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:27,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 21:36:27,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=896, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 21:36:27,321 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:27,465 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2021-12-15 21:36:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 21:36:27,466 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 21:36:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:27,466 INFO L225 Difference]: With dead ends: 164 [2021-12-15 21:36:27,466 INFO L226 Difference]: Without dead ends: 103 [2021-12-15 21:36:27,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=614, Invalid=946, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 21:36:27,467 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:27,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 164 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:36:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-15 21:36:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-12-15 21:36:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-12-15 21:36:27,472 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 96 [2021-12-15 21:36:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:27,473 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-12-15 21:36:27,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-12-15 21:36:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-15 21:36:27,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:27,474 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:27,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-15 21:36:27,685 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,SelfDestructingSolverStorable23 [2021-12-15 21:36:27,686 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:27,686 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 21 times [2021-12-15 21:36:27,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:27,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912530287] [2021-12-15 21:36:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:27,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 36 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:28,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:28,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912530287] [2021-12-15 21:36:28,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912530287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:28,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724641231] [2021-12-15 21:36:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:36:28,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:28,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:28,018 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:28,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 21:36:28,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-15 21:36:28,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-15 21:36:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:28,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:28,697 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,697 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 31 treesize of output 30 [2021-12-15 21:36:28,708 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:28,709 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 [2021-12-15 21:36:28,733 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,733 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 31 treesize of output 30 [2021-12-15 21:36:28,741 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:28,741 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 [2021-12-15 21:36:28,766 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,767 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 31 treesize of output 30 [2021-12-15 21:36:28,775 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:28,775 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 [2021-12-15 21:36:28,803 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,803 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 31 treesize of output 30 [2021-12-15 21:36:28,812 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:28,812 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 [2021-12-15 21:36:28,841 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:28,849 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:28,849 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 [2021-12-15 21:36:28,877 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,878 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 31 treesize of output 30 [2021-12-15 21:36:28,885 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:28,886 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 [2021-12-15 21:36:28,913 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,913 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 31 treesize of output 30 [2021-12-15 21:36:28,921 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:28,921 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 [2021-12-15 21:36:28,953 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:28,965 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:28,965 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 [2021-12-15 21:36:28,993 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:28,993 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 31 treesize of output 30 [2021-12-15 21:36:29,000 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:29,000 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 [2021-12-15 21:36:29,037 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:29,037 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 31 treesize of output 30 [2021-12-15 21:36:29,046 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:29,046 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 30 treesize of output 29 [2021-12-15 21:36:29,130 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:29,131 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 [2021-12-15 21:36:29,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-15 21:36:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:29,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:31,486 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 24 treesize of output 22 [2021-12-15 21:36:31,488 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 192 treesize of output 184 [2021-12-15 21:36:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 66 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:31,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724641231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:31,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:31,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 30] total 76 [2021-12-15 21:36:31,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986822798] [2021-12-15 21:36:31,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:31,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-15 21:36:31,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-15 21:36:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=4843, Unknown=0, NotChecked=0, Total=5700 [2021-12-15 21:36:31,533 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 76 states, 76 states have (on average 3.8157894736842106) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:34,044 INFO L93 Difference]: Finished difference Result 209 states and 225 transitions. [2021-12-15 21:36:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-15 21:36:34,045 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.8157894736842106) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-15 21:36:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:34,046 INFO L225 Difference]: With dead ends: 209 [2021-12-15 21:36:34,046 INFO L226 Difference]: Without dead ends: 207 [2021-12-15 21:36:34,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 201 SyntacticMatches, 21 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8938 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3263, Invalid=21543, Unknown=0, NotChecked=0, Total=24806 [2021-12-15 21:36:34,052 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 559 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:34,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 900 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1016 Invalid, 0 Unknown, 333 Unchecked, 0.5s Time] [2021-12-15 21:36:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-15 21:36:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 157. [2021-12-15 21:36:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 156 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2021-12-15 21:36:34,061 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 100 [2021-12-15 21:36:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:34,061 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2021-12-15 21:36:34,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.8157894736842106) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2021-12-15 21:36:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 21:36:34,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:34,062 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:34,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:34,280 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,SelfDestructingSolverStorable24 [2021-12-15 21:36:34,280 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 22 times [2021-12-15 21:36:34,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:34,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766565341] [2021-12-15 21:36:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:34,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 72 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:35,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:35,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766565341] [2021-12-15 21:36:35,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766565341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:35,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053577739] [2021-12-15 21:36:35,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:36:35,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:35,504 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:35,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 21:36:35,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:36:35,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:35,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-15 21:36:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:35,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:35,713 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:35,714 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 31 treesize of output 30 [2021-12-15 21:36:35,725 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:35,725 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 [2021-12-15 21:36:35,769 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:35,770 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 31 treesize of output 30 [2021-12-15 21:36:35,782 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:35,782 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 [2021-12-15 21:36:35,825 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:35,825 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 31 treesize of output 30 [2021-12-15 21:36:35,838 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:35,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:36:35,882 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:35,882 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 31 treesize of output 30 [2021-12-15 21:36:35,894 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:35,895 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 [2021-12-15 21:36:35,938 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:35,938 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 31 treesize of output 30 [2021-12-15 21:36:35,951 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:35,951 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 [2021-12-15 21:36:35,997 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:35,997 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 31 treesize of output 30 [2021-12-15 21:36:36,011 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:36,011 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 [2021-12-15 21:36:36,056 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:36,056 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 31 treesize of output 30 [2021-12-15 21:36:36,068 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:36,068 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 [2021-12-15 21:36:36,113 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:36,114 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 31 treesize of output 30 [2021-12-15 21:36:36,126 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:36,126 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 [2021-12-15 21:36:36,172 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:36,172 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 31 treesize of output 30 [2021-12-15 21:36:36,184 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:36,184 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 [2021-12-15 21:36:36,245 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:36,245 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 31 treesize of output 30 [2021-12-15 21:36:36,257 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:36,257 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 [2021-12-15 21:36:36,301 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:36,301 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 31 treesize of output 30 [2021-12-15 21:36:36,313 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:36,313 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 [2021-12-15 21:36:36,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:36:36,426 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 [2021-12-15 21:36:37,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:36:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 37 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:37,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:38,933 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 24 treesize of output 22 [2021-12-15 21:36:38,935 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 192 treesize of output 184 [2021-12-15 21:36:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 72 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:38,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053577739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:38,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:38,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 91 [2021-12-15 21:36:38,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276103664] [2021-12-15 21:36:38,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:38,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-15 21:36:38,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:38,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-15 21:36:38,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1257, Invalid=6933, Unknown=0, NotChecked=0, Total=8190 [2021-12-15 21:36:38,993 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:44,054 INFO L93 Difference]: Finished difference Result 300 states and 307 transitions. [2021-12-15 21:36:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-15 21:36:44,061 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 21:36:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:44,063 INFO L225 Difference]: With dead ends: 300 [2021-12-15 21:36:44,063 INFO L226 Difference]: Without dead ends: 298 [2021-12-15 21:36:44,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 193 SyntacticMatches, 27 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11367 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4924, Invalid=23806, Unknown=0, NotChecked=0, Total=28730 [2021-12-15 21:36:44,065 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 732 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:44,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 1045 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1389 Invalid, 0 Unknown, 455 Unchecked, 0.7s Time] [2021-12-15 21:36:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-15 21:36:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 157. [2021-12-15 21:36:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 156 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2021-12-15 21:36:44,077 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 108 [2021-12-15 21:36:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:44,077 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2021-12-15 21:36:44,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2021-12-15 21:36:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 21:36:44,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:44,078 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:44,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-15 21:36:44,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-15 21:36:44,283 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 23 times [2021-12-15 21:36:44,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:44,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791191708] [2021-12-15 21:36:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:44,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:44,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:44,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791191708] [2021-12-15 21:36:44,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791191708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:44,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753378411] [2021-12-15 21:36:44,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:36:44,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:44,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:44,479 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:44,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 21:36:44,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-15 21:36:44,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 21:36:44,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:45,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 375 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:45,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753378411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:45,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:45,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 45 [2021-12-15 21:36:45,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979271703] [2021-12-15 21:36:45,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:45,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-15 21:36:45,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:45,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-15 21:36:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=1199, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 21:36:45,641 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:45,768 INFO L93 Difference]: Finished difference Result 282 states and 289 transitions. [2021-12-15 21:36:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 21:36:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 21:36:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:45,769 INFO L225 Difference]: With dead ends: 282 [2021-12-15 21:36:45,769 INFO L226 Difference]: Without dead ends: 119 [2021-12-15 21:36:45,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=845, Invalid=1317, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 21:36:45,770 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 90 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:45,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 158 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:36:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-15 21:36:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-12-15 21:36:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-12-15 21:36:45,778 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2021-12-15 21:36:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:45,778 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-12-15 21:36:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-12-15 21:36:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 21:36:45,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:45,779 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:45,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:45,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:45,994 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:45,994 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 24 times [2021-12-15 21:36:45,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:45,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854688028] [2021-12-15 21:36:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:45,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 42 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:46,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:46,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854688028] [2021-12-15 21:36:46,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854688028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:46,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720742801] [2021-12-15 21:36:46,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:36:46,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:46,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:46,463 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:46,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 21:36:48,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-15 21:36:48,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-15 21:36:48,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:48,552 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,552 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 31 treesize of output 30 [2021-12-15 21:36:48,562 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,563 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 [2021-12-15 21:36:48,577 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,577 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 31 treesize of output 30 [2021-12-15 21:36:48,587 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,587 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 [2021-12-15 21:36:48,601 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,601 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 31 treesize of output 30 [2021-12-15 21:36:48,611 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,612 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 [2021-12-15 21:36:48,626 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,626 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 31 treesize of output 30 [2021-12-15 21:36:48,636 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,637 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 [2021-12-15 21:36:48,651 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,651 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 31 treesize of output 30 [2021-12-15 21:36:48,661 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:36:48,676 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,676 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 31 treesize of output 30 [2021-12-15 21:36:48,686 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:36:48,701 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,701 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 31 treesize of output 30 [2021-12-15 21:36:48,711 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,712 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 [2021-12-15 21:36:48,726 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,726 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 31 treesize of output 30 [2021-12-15 21:36:48,737 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,737 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 [2021-12-15 21:36:48,752 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:48,762 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,763 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 [2021-12-15 21:36:48,777 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:48,788 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,788 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 [2021-12-15 21:36:48,803 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,803 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 31 treesize of output 30 [2021-12-15 21:36:48,813 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,813 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 [2021-12-15 21:36:48,827 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:48,827 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 31 treesize of output 30 [2021-12-15 21:36:48,837 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:48,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-15 21:36:48,907 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-15 21:36:48,907 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 21 treesize of output 20 [2021-12-15 21:36:49,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:36:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 40 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:49,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 78 proven. 638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:50,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720742801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:50,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:50,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33, 34] total 51 [2021-12-15 21:36:50,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590832053] [2021-12-15 21:36:50,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:50,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-15 21:36:50,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-15 21:36:50,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 21:36:50,556 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:53,319 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2021-12-15 21:36:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-15 21:36:53,322 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-15 21:36:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:53,322 INFO L225 Difference]: With dead ends: 135 [2021-12-15 21:36:53,322 INFO L226 Difference]: Without dead ends: 133 [2021-12-15 21:36:53,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 222 SyntacticMatches, 28 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4322 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2459, Invalid=10651, Unknown=0, NotChecked=0, Total=13110 [2021-12-15 21:36:53,324 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 331 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:53,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 672 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 21:36:53,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-15 21:36:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2021-12-15 21:36:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2021-12-15 21:36:53,336 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2021-12-15 21:36:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:53,337 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2021-12-15 21:36:53,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2021-12-15 21:36:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-15 21:36:53,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:53,338 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:53,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-15 21:36:53,538 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,SelfDestructingSolverStorable27 [2021-12-15 21:36:53,538 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1492478465, now seen corresponding path program 25 times [2021-12-15 21:36:53,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:53,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172683858] [2021-12-15 21:36:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:53,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:53,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172683858] [2021-12-15 21:36:53,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172683858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028760197] [2021-12-15 21:36:53,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:36:53,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:53,727 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:53,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 21:36:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:53,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-15 21:36:53,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:54,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:36:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 432 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:54,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028760197] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:36:54,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:36:54,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32, 32] total 48 [2021-12-15 21:36:54,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619005580] [2021-12-15 21:36:54,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:36:54,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-15 21:36:54,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:36:54,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-15 21:36:54,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=1367, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 21:36:54,574 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:36:54,704 INFO L93 Difference]: Finished difference Result 200 states and 205 transitions. [2021-12-15 21:36:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-15 21:36:54,708 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-15 21:36:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:36:54,709 INFO L225 Difference]: With dead ends: 200 [2021-12-15 21:36:54,709 INFO L226 Difference]: Without dead ends: 127 [2021-12-15 21:36:54,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 21:36:54,710 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 95 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:36:54,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 178 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:36:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-15 21:36:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-12-15 21:36:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-12-15 21:36:54,718 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 120 [2021-12-15 21:36:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:36:54,718 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-12-15 21:36:54,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:36:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-12-15 21:36:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 21:36:54,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:36:54,719 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:36:54,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-15 21:36:54,930 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,SelfDestructingSolverStorable28 [2021-12-15 21:36:54,931 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:36:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:36:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 26 times [2021-12-15 21:36:54,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:36:54,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857850512] [2021-12-15 21:36:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:36:54,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:36:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:36:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 80 proven. 747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:55,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:36:55,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857850512] [2021-12-15 21:36:55,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857850512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:36:55,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599747590] [2021-12-15 21:36:55,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:36:55,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:36:55,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:36:56,001 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:36:56,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 21:36:56,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:36:56,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:36:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-15 21:36:56,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:36:56,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:36:56,226 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,226 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 31 treesize of output 30 [2021-12-15 21:36:56,238 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,238 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 [2021-12-15 21:36:56,278 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,278 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 31 treesize of output 30 [2021-12-15 21:36:56,309 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,309 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 [2021-12-15 21:36:56,326 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,326 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 31 treesize of output 30 [2021-12-15 21:36:56,337 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,337 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 [2021-12-15 21:36:56,355 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,355 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 31 treesize of output 30 [2021-12-15 21:36:56,364 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,364 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 [2021-12-15 21:36:56,376 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,376 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 31 treesize of output 30 [2021-12-15 21:36:56,384 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-15 21:36:56,395 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,396 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 31 treesize of output 30 [2021-12-15 21:36:56,413 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-15 21:36:56,433 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,434 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 31 treesize of output 30 [2021-12-15 21:36:56,448 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,448 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 [2021-12-15 21:36:56,467 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,468 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 31 treesize of output 30 [2021-12-15 21:36:56,485 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,486 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 [2021-12-15 21:36:56,524 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,524 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 31 treesize of output 30 [2021-12-15 21:36:56,536 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,536 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 [2021-12-15 21:36:56,563 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,563 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 31 treesize of output 30 [2021-12-15 21:36:56,575 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:36:56,594 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,594 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 31 treesize of output 30 [2021-12-15 21:36:56,605 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,605 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 [2021-12-15 21:36:56,626 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,627 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 31 treesize of output 30 [2021-12-15 21:36:56,641 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,641 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 [2021-12-15 21:36:56,661 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:36:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-15 21:36:56,674 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 21:36:56,674 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 30 treesize of output 29 [2021-12-15 21:36:56,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:36:56,777 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 21 treesize of output 20 [2021-12-15 21:36:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 21:36:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 43 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:36:57,301 INFO L328 TraceCheckSpWp]: Computing backward predicates...