./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mbpr3.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/mbpr3.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 a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:33:50,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:33:50,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:33:50,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:33:50,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:33:50,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:33:50,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:33:50,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:33:50,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:33:50,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:33:50,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:33:50,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:33:50,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:33:50,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:33:50,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:33:50,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:33:50,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:33:50,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:33:50,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:33:50,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:33:50,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:33:50,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:33:50,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:33:50,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:33:50,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:33:50,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:33:50,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:33:50,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:33:50,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:33:50,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:33:50,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:33:50,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:33:50,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:33:50,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:33:50,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:33:50,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:33:50,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:33:50,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:33:50,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:33:50,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:33:50,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:33:50,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:33:50,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:33:50,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:33:50,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:33:50,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:33:50,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:33:50,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:33:50,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:33:50,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:33:50,854 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:33:50,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:33:50,855 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:33:50,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:33:50,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:33:50,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:33:50,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:33:50,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:33:50,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:33:50,857 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:33:50,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:33:50,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:33:50,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:33:50,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:33:50,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:33:50,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:33:50,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:33:50,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:33:50,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:33:50,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:33:50,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:33:50,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:33:50,859 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:33:50,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:33:50,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:33:50,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:33:50,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 [2021-12-15 21:33:51,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:33:51,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:33:51,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:33:51,099 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:33:51,099 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:33:51,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mbpr3.c [2021-12-15 21:33:51,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0eef0167/e731bb609e474921aac9630c82ea595d/FLAG4ff47c2a2 [2021-12-15 21:33:51,492 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:33:51,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr3.c [2021-12-15 21:33:51,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0eef0167/e731bb609e474921aac9630c82ea595d/FLAG4ff47c2a2 [2021-12-15 21:33:51,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0eef0167/e731bb609e474921aac9630c82ea595d [2021-12-15 21:33:51,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:33:51,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:33:51,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:33:51,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:33:51,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:33:51,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c86d120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51, skipping insertion in model container [2021-12-15 21:33:51,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:33:51,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:33:51,675 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/mbpr3.c[396,409] [2021-12-15 21:33:51,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:33:51,702 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:33:51,711 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/mbpr3.c[396,409] [2021-12-15 21:33:51,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:33:51,742 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:33:51,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51 WrapperNode [2021-12-15 21:33:51,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:33:51,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:33:51,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:33:51,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:33:51,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,794 INFO L137 Inliner]: procedures = 15, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 107 [2021-12-15 21:33:51,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:33:51,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:33:51,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:33:51,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:33:51,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:33:51,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:33:51,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:33:51,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:33:51,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (1/1) ... [2021-12-15 21:33:51,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:33:51,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:33:51,873 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 21:33:51,880 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 21:33:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:33:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:33:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:33:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:33:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:33:51,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:33:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:33:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:33:51,969 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:33:51,971 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:33:52,137 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:33:52,142 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:33:52,142 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 21:33:52,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:33:52 BoogieIcfgContainer [2021-12-15 21:33:52,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:33:52,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:33:52,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:33:52,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:33:52,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:33:51" (1/3) ... [2021-12-15 21:33:52,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6568848f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:33:52, skipping insertion in model container [2021-12-15 21:33:52,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:51" (2/3) ... [2021-12-15 21:33:52,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6568848f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:33:52, skipping insertion in model container [2021-12-15 21:33:52,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:33:52" (3/3) ... [2021-12-15 21:33:52,154 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2021-12-15 21:33:52,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:33:52,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:33:52,197 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:33:52,204 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 21:33:52,204 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:33:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.53125) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 21:33:52,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:52,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:52,238 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -565609025, now seen corresponding path program 1 times [2021-12-15 21:33:52,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:52,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999923781] [2021-12-15 21:33:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:52,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:52,447 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 21:33:52,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:52,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999923781] [2021-12-15 21:33:52,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999923781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:33:52,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:33:52,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:33:52,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479452978] [2021-12-15 21:33:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:33:52,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:33:52,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:33:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:33:52,489 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.53125) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:52,508 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2021-12-15 21:33:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:33:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 21:33:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:52,517 INFO L225 Difference]: With dead ends: 63 [2021-12-15 21:33:52,517 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 21:33:52,520 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 21:33:52,524 INFO L933 BasicCegarLoop]: 43 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, 43 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 21:33:52,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:33:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 21:33:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-15 21:33:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-15 21:33:52,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2021-12-15 21:33:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:52,564 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-15 21:33:52,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-15 21:33:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 21:33:52,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:52,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:52,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:33:52,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:52,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:52,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1539779609, now seen corresponding path program 1 times [2021-12-15 21:33:52,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:52,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84859761] [2021-12-15 21:33:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:52,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:52,690 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 21:33:52,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:52,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84859761] [2021-12-15 21:33:52,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84859761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:33:52,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:33:52,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:33:52,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718710372] [2021-12-15 21:33:52,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:33:52,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:33:52,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:33:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:33:52,696 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:52,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:52,735 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-12-15 21:33:52,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:33:52,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 21:33:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:52,739 INFO L225 Difference]: With dead ends: 38 [2021-12-15 21:33:52,739 INFO L226 Difference]: Without dead ends: 36 [2021-12-15 21:33:52,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:33:52,743 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:52,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 98 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:33:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-15 21:33:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-12-15 21:33:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-12-15 21:33:52,751 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2021-12-15 21:33:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:52,753 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-12-15 21:33:52,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-12-15 21:33:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 21:33:52,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:52,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:52,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:33:52,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1539720027, now seen corresponding path program 1 times [2021-12-15 21:33:52,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:52,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864629471] [2021-12-15 21:33:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:52,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:52,935 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 21:33:52,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:52,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864629471] [2021-12-15 21:33:52,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864629471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:33:52,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:33:52,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 21:33:52,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332401049] [2021-12-15 21:33:52,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:33:52,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 21:33:52,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:52,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 21:33:52,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:33:52,939 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:53,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:53,032 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2021-12-15 21:33:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:33:53,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 21:33:53,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:53,033 INFO L225 Difference]: With dead ends: 64 [2021-12-15 21:33:53,034 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 21:33:53,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:33:53,037 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:53,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 23 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:33:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 21:33:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-12-15 21:33:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-15 21:33:53,049 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-12-15 21:33:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:53,050 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-15 21:33:53,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-15 21:33:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 21:33:53,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:53,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:53,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 21:33:53,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2048606314, now seen corresponding path program 1 times [2021-12-15 21:33:53,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:53,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698956154] [2021-12-15 21:33:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:53,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:53,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698956154] [2021-12-15 21:33:53,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698956154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:33:53,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:33:53,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:33:53,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641854942] [2021-12-15 21:33:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:33:53,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:33:53,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:33:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:33:53,147 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:53,157 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-12-15 21:33:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:33:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 21:33:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:53,159 INFO L225 Difference]: With dead ends: 49 [2021-12-15 21:33:53,159 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 21:33:53,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 21:33:53,160 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:53,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:33:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 21:33:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-15 21:33:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-15 21:33:53,165 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2021-12-15 21:33:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:53,166 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-15 21:33:53,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-15 21:33:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 21:33:53,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:53,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:53,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 21:33:53,168 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:53,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1853333972, now seen corresponding path program 1 times [2021-12-15 21:33:53,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:53,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91111544] [2021-12-15 21:33:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:53,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:33:53,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:53,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91111544] [2021-12-15 21:33:53,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91111544] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:33:53,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482443890] [2021-12-15 21:33:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:53,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:33:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:33:53,587 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 21:33:53,594 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 21:33:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:53,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-15 21:33:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:33:53,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:33:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:53,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-15 21:33:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:53,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:33:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:53,955 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 28 treesize of output 20 [2021-12-15 21:33:54,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:54,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:33:54,087 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 0 case distinctions, treesize of input 36 treesize of output 29 [2021-12-15 21:33:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:54,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:33:54,170 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 21:33:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:33:54,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:33:54,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 21:33:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-15 21:33:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:54,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482443890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:33:54,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:33:54,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2021-12-15 21:33:54,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687553759] [2021-12-15 21:33:54,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:33:54,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 21:33:54,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 21:33:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-15 21:33:54,471 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:54,737 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2021-12-15 21:33:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:33:54,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 21:33:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:54,738 INFO L225 Difference]: With dead ends: 90 [2021-12-15 21:33:54,738 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 21:33:54,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:33:54,740 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 202 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:54,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 86 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:33:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 21:33:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2021-12-15 21:33:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-15 21:33:54,744 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2021-12-15 21:33:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:54,745 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-15 21:33:54,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-15 21:33:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:33:54,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:54,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:54,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:33:54,959 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 21:33:54,960 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash -166695065, now seen corresponding path program 1 times [2021-12-15 21:33:54,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:54,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611842296] [2021-12-15 21:33:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:54,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:33:55,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:55,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611842296] [2021-12-15 21:33:55,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611842296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:33:55,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939713148] [2021-12-15 21:33:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:55,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:33:55,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:33:55,148 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 21:33:55,173 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 21:33:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:55,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 21:33:55,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:33:55,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:33:55,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:55,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:33:55,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:33:55,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:55,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:33:55,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:33:55,476 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 35 treesize of output 23 [2021-12-15 21:33:55,599 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 21:33:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:33:55,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:33:55,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:33:55,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 21:33:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:55,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939713148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:33:55,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:33:55,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-15 21:33:55,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96821224] [2021-12-15 21:33:55,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:33:55,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 21:33:55,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:55,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 21:33:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:33:55,864 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:56,172 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-12-15 21:33:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 21:33:56,175 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-15 21:33:56,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:56,176 INFO L225 Difference]: With dead ends: 79 [2021-12-15 21:33:56,176 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 21:33:56,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-15 21:33:56,177 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:56,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 73 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:33:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 21:33:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2021-12-15 21:33:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 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 21:33:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-15 21:33:56,186 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 35 [2021-12-15 21:33:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:56,187 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-15 21:33:56,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-15 21:33:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 21:33:56,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:56,188 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:56,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:33:56,395 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 21:33:56,396 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:56,396 INFO L85 PathProgramCache]: Analyzing trace with hash 693076666, now seen corresponding path program 2 times [2021-12-15 21:33:56,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:56,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921661620] [2021-12-15 21:33:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:56,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:56,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921661620] [2021-12-15 21:33:56,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921661620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:33:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123441541] [2021-12-15 21:33:56,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:33:56,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:33:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:33:56,550 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 21:33:56,555 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 21:33:56,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:33:56,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:33:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 21:33:56,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:33:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:33:56,709 INFO L354 Elim1Store]: treesize reduction 74, result has 20.4 percent of original size [2021-12-15 21:33:56,709 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 2 case distinctions, treesize of input 26 treesize of output 29 [2021-12-15 21:33:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:56,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:33:56,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:33:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 21:33:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:56,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123441541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:33:56,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:33:56,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2021-12-15 21:33:56,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684755342] [2021-12-15 21:33:56,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:33:56,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 21:33:56,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 21:33:56,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:33:56,947 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:57,307 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-12-15 21:33:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 21:33:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 21:33:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:57,312 INFO L225 Difference]: With dead ends: 76 [2021-12-15 21:33:57,312 INFO L226 Difference]: Without dead ends: 74 [2021-12-15 21:33:57,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-12-15 21:33:57,314 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:57,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 120 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:33:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-15 21:33:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2021-12-15 21:33:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-15 21:33:57,330 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 41 [2021-12-15 21:33:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:57,330 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-15 21:33:57,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-15 21:33:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 21:33:57,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:57,334 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:57,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 21:33:57,547 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 21:33:57,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash -296121395, now seen corresponding path program 3 times [2021-12-15 21:33:57,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:57,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143245538] [2021-12-15 21:33:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:57,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:57,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143245538] [2021-12-15 21:33:57,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143245538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:33:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191637286] [2021-12-15 21:33:57,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:33:57,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:33:57,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:33:57,832 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 21:33:57,859 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 21:33:57,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 21:33:57,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:33:57,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 21:33:57,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:33:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:58,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:33:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:33:58,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191637286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:33:58,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:33:58,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2021-12-15 21:33:58,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605910129] [2021-12-15 21:33:58,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:33:58,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 21:33:58,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:58,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 21:33:58,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-12-15 21:33:58,506 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:58,798 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2021-12-15 21:33:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:33:58,798 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 21:33:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:58,799 INFO L225 Difference]: With dead ends: 136 [2021-12-15 21:33:58,799 INFO L226 Difference]: Without dead ends: 69 [2021-12-15 21:33:58,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2021-12-15 21:33:58,801 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 320 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:58,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 125 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:33:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-15 21:33:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-12-15 21:33:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 59 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-12-15 21:33:58,813 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 47 [2021-12-15 21:33:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:58,815 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-12-15 21:33:58,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-12-15 21:33:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 21:33:58,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:58,818 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:58,844 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 21:33:59,026 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 21:33:59,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1825837756, now seen corresponding path program 4 times [2021-12-15 21:33:59,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:59,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496079343] [2021-12-15 21:33:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:59,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 21:33:59,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496079343] [2021-12-15 21:33:59,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496079343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:33:59,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509070491] [2021-12-15 21:33:59,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:33:59,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:33:59,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:33:59,245 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 21:33:59,273 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 21:33:59,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:33:59,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:33:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:33:59,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:33:59,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:33:59,431 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-15 21:33:59,432 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 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-15 21:33:59,482 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 21:33:59,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:33:59,519 INFO L354 Elim1Store]: treesize reduction 129, result has 14.6 percent of original size [2021-12-15 21:33:59,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 37 [2021-12-15 21:33:59,668 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 21:33:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 21:33:59,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:01,873 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_80| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_80| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_303 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_80| 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) v_ArrVal_303) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-15 21:34:01,933 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 41 treesize of output 39 [2021-12-15 21:34:01,938 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 3464 treesize of output 3432 [2021-12-15 21:34:09,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-15 21:34:09,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:34:09,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-15 21:34:09,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218396327] [2021-12-15 21:34:09,278 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:09,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 21:34:09,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:09,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 21:34:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=443, Unknown=1, NotChecked=44, Total=600 [2021-12-15 21:34:09,279 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:09,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:09,415 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-12-15 21:34:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:34:09,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-15 21:34:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:09,417 INFO L225 Difference]: With dead ends: 77 [2021-12-15 21:34:09,417 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 21:34:09,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=137, Invalid=516, Unknown=1, NotChecked=48, Total=702 [2021-12-15 21:34:09,418 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:09,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 92 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 21:34:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-12-15 21:34:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-15 21:34:09,423 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 59 [2021-12-15 21:34:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:09,424 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-15 21:34:09,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-15 21:34:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 21:34:09,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:09,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:09,442 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 21:34:09,631 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 21:34:09,632 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:09,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:09,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1432810746, now seen corresponding path program 5 times [2021-12-15 21:34:09,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:09,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531244796] [2021-12-15 21:34:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:09,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:34:10,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:10,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531244796] [2021-12-15 21:34:10,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531244796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:10,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478756475] [2021-12-15 21:34:10,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:34:10,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:10,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:10,219 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 21:34:10,221 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 21:34:10,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 21:34:10,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 21:34:10,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:10,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:10,968 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-12-15 21:34:10,968 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 2 case distinctions, treesize of input 28 treesize of output 31 [2021-12-15 21:34:11,027 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 21:34:11,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:11,053 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-15 21:34:11,054 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 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-15 21:34:11,092 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:34:11,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:11,110 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 21:34:11,110 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 2 case distinctions, treesize of input 37 treesize of output 25 [2021-12-15 21:34:11,141 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 21:34:11,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:11,162 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-15 21:34:11,162 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 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-15 21:34:11,195 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:34:11,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:11,206 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 0 case distinctions, treesize of input 54 treesize of output 43 [2021-12-15 21:34:11,214 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-15 21:34:11,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 46 [2021-12-15 21:34:11,385 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 21:34:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:11,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:11,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:34:11,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 21:34:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:34:11,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478756475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:11,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:11,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 29 [2021-12-15 21:34:11,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13200792] [2021-12-15 21:34:11,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:11,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 21:34:11,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:11,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 21:34:11,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-12-15 21:34:11,920 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 29 states, 29 states have (on average 5.655172413793103) internal successors, (164), 29 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 21:34:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:12,749 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2021-12-15 21:34:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 21:34:12,750 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.655172413793103) internal successors, (164), 29 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-15 21:34:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:12,752 INFO L225 Difference]: With dead ends: 143 [2021-12-15 21:34:12,752 INFO L226 Difference]: Without dead ends: 133 [2021-12-15 21:34:12,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 21:34:12,754 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 297 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:12,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 185 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 767 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2021-12-15 21:34:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-15 21:34:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 66. [2021-12-15 21:34:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-15 21:34:12,765 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2021-12-15 21:34:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:12,766 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-15 21:34:12,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.655172413793103) internal successors, (164), 29 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 21:34:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-15 21:34:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 21:34:12,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:12,768 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:12,796 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 21:34:12,983 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 21:34:12,984 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:12,984 INFO L85 PathProgramCache]: Analyzing trace with hash 757222925, now seen corresponding path program 6 times [2021-12-15 21:34:12,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:12,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849975816] [2021-12-15 21:34:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:12,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:14,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849975816] [2021-12-15 21:34:14,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849975816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680628381] [2021-12-15 21:34:14,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:34:14,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:14,038 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 21:34:14,039 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 21:34:14,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 21:34:14,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-15 21:34:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:14,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:14,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 40 [2021-12-15 21:34:14,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:34:14,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2021-12-15 21:34:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:14,950 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 0 case distinctions, treesize of input 81 treesize of output 68 [2021-12-15 21:34:14,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:34:14,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:14,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2021-12-15 21:34:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:15,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:16,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-12-15 21:34:16,756 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 67 treesize of output 59 [2021-12-15 21:34:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:17,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680628381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:17,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:17,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 66 [2021-12-15 21:34:17,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292356448] [2021-12-15 21:34:17,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:17,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-15 21:34:17,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-15 21:34:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=3794, Unknown=0, NotChecked=0, Total=4290 [2021-12-15 21:34:17,612 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 66 states, 66 states have (on average 2.8333333333333335) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 21:34:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:25,459 INFO L93 Difference]: Finished difference Result 278 states and 303 transitions. [2021-12-15 21:34:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-15 21:34:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.8333333333333335) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 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 65 [2021-12-15 21:34:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:25,461 INFO L225 Difference]: With dead ends: 278 [2021-12-15 21:34:25,461 INFO L226 Difference]: Without dead ends: 243 [2021-12-15 21:34:25,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7689 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=4220, Invalid=22840, Unknown=0, NotChecked=0, Total=27060 [2021-12-15 21:34:25,468 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1485 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 1074 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 3596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1074 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:25,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 477 Invalid, 3596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1074 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 21:34:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-15 21:34:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 106. [2021-12-15 21:34:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 105 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-12-15 21:34:25,478 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 65 [2021-12-15 21:34:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:25,478 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-12-15 21:34:25,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.8333333333333335) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 21:34:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-12-15 21:34:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 21:34:25,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:25,480 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:25,503 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 21:34:25,695 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 21:34:25,696 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1552195955, now seen corresponding path program 7 times [2021-12-15 21:34:25,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:25,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594854989] [2021-12-15 21:34:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:25,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 83 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:34:26,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:26,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594854989] [2021-12-15 21:34:26,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594854989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:26,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480164179] [2021-12-15 21:34:26,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:34:26,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:26,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:26,024 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 21:34:26,045 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 21:34:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 21:34:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 114 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:34:26,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 114 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:34:27,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480164179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:27,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:27,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2021-12-15 21:34:27,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804991564] [2021-12-15 21:34:27,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:27,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-15 21:34:27,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:27,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-15 21:34:27,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 21:34:27,078 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 40 states, 40 states have (on average 4.875) internal successors, (195), 40 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 21:34:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:27,427 INFO L93 Difference]: Finished difference Result 216 states and 229 transitions. [2021-12-15 21:34:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 21:34:27,427 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.875) internal successors, (195), 40 states have internal predecessors, (195), 0 states have call successors, (0), 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 77 [2021-12-15 21:34:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:27,428 INFO L225 Difference]: With dead ends: 216 [2021-12-15 21:34:27,428 INFO L226 Difference]: Without dead ends: 99 [2021-12-15 21:34:27,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 21:34:27,430 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 456 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:27,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 209 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:34:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-15 21:34:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2021-12-15 21:34:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 89 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 21:34:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-12-15 21:34:27,436 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 77 [2021-12-15 21:34:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:27,437 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-12-15 21:34:27,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.875) internal successors, (195), 40 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 21:34:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-12-15 21:34:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-15 21:34:27,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:27,440 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:27,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-15 21:34:27,643 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 21:34:27,644 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:27,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1369982430, now seen corresponding path program 8 times [2021-12-15 21:34:27,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:27,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277242149] [2021-12-15 21:34:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:27,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:28,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:28,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277242149] [2021-12-15 21:34:28,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277242149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:28,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236814098] [2021-12-15 21:34:28,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:28,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:28,912 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 21:34:28,925 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 21:34:29,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:29,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 21:34:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:29,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:29,184 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-15 21:34:29,184 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 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-15 21:34:29,243 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 21:34:29,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:29,271 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-15 21:34:29,272 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 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-15 21:34:29,663 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 21:34:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 42 proven. 85 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 21:34:29,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:32,062 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_164| Int)) (or (forall ((v_ArrVal_696 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_164| 12) (- 4)) v_ArrVal_696) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_164| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-15 21:34:32,144 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 41 treesize of output 39 [2021-12-15 21:34:32,148 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 3464 treesize of output 3432 [2021-12-15 21:34:33,759 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-15 21:34:33,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:34:33,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-15 21:34:33,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484772323] [2021-12-15 21:34:33,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:33,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 21:34:33,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 21:34:33,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1969, Unknown=1, NotChecked=90, Total=2256 [2021-12-15 21:34:33,761 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:35,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:35,343 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-12-15 21:34:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 21:34:35,343 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-15 21:34:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:35,344 INFO L225 Difference]: With dead ends: 149 [2021-12-15 21:34:35,344 INFO L226 Difference]: Without dead ends: 139 [2021-12-15 21:34:35,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=450, Invalid=4245, Unknown=1, NotChecked=134, Total=4830 [2021-12-15 21:34:35,346 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 438 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:35,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 325 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 21:34:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-15 21:34:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2021-12-15 21:34:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.063157894736842) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-12-15 21:34:35,357 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 89 [2021-12-15 21:34:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:35,357 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-12-15 21:34:35,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-12-15 21:34:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 21:34:35,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:35,358 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:35,377 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 21:34:35,567 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 21:34:35,568 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2119920331, now seen corresponding path program 9 times [2021-12-15 21:34:35,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:35,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751185886] [2021-12-15 21:34:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:35,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 16 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:36,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:36,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751185886] [2021-12-15 21:34:36,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751185886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:36,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021809275] [2021-12-15 21:34:36,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:34:36,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:36,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:36,606 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 21:34:36,606 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 21:34:37,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-15 21:34:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:37,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-15 21:34:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:37,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:37,809 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-15 21:34:37,811 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 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-15 21:34:38,213 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:34:38,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:38,302 INFO L354 Elim1Store]: treesize reduction 127, result has 20.6 percent of original size [2021-12-15 21:34:38,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 48 [2021-12-15 21:34:38,695 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:34:38,695 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 39 treesize of output 38 [2021-12-15 21:34:38,813 INFO L354 Elim1Store]: treesize reduction 127, result has 20.6 percent of original size [2021-12-15 21:34:38,813 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 2 case distinctions, treesize of input 47 treesize of output 58 [2021-12-15 21:34:39,345 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:34:39,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:39,454 INFO L354 Elim1Store]: treesize reduction 283, result has 11.6 percent of original size [2021-12-15 21:34:39,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 58 treesize of output 55 [2021-12-15 21:34:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 16 proven. 162 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 21:34:40,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:42,759 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 71 treesize of output 67 [2021-12-15 21:34:42,768 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 21415 treesize of output 21287 [2021-12-15 21:34:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 21:34:43,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021809275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:43,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:43,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 26] total 76 [2021-12-15 21:34:43,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143602681] [2021-12-15 21:34:43,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:43,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-15 21:34:43,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-15 21:34:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=5190, Unknown=0, NotChecked=0, Total=5700 [2021-12-15 21:34:43,308 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 76 states, 76 states have (on average 3.3289473684210527) internal successors, (253), 76 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 21:34:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:48,251 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2021-12-15 21:34:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-15 21:34:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.3289473684210527) internal successors, (253), 76 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 21:34:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:48,253 INFO L225 Difference]: With dead ends: 287 [2021-12-15 21:34:48,253 INFO L226 Difference]: Without dead ends: 277 [2021-12-15 21:34:48,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 161 SyntacticMatches, 12 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8937 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2237, Invalid=26493, Unknown=0, NotChecked=0, Total=28730 [2021-12-15 21:34:48,257 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 413 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 916 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:48,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1022 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 848 Invalid, 0 Unknown, 916 Unchecked, 0.4s Time] [2021-12-15 21:34:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-15 21:34:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 212. [2021-12-15 21:34:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.061611374407583) internal successors, (224), 211 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 21:34:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 224 transitions. [2021-12-15 21:34:48,271 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 224 transitions. Word has length 95 [2021-12-15 21:34:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:48,272 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 224 transitions. [2021-12-15 21:34:48,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.3289473684210527) internal successors, (253), 76 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 21:34:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 224 transitions. [2021-12-15 21:34:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 21:34:48,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:48,273 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:48,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-15 21:34:48,483 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 21:34:48,484 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1153978611, now seen corresponding path program 10 times [2021-12-15 21:34:48,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:48,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754920248] [2021-12-15 21:34:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:48,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:49,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:49,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754920248] [2021-12-15 21:34:49,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754920248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:49,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912806052] [2021-12-15 21:34:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:34:49,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:49,776 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 21:34:49,776 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 21:34:49,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:34:49,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:49,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-15 21:34:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:50,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:50,146 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-12-15 21:34:50,146 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 2 case distinctions, treesize of input 28 treesize of output 31 [2021-12-15 21:34:50,222 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 21:34:50,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:50,241 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-15 21:34:50,241 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 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-15 21:34:50,289 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 21:34:50,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:50,324 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-15 21:34:50,325 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 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-15 21:34:50,380 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:34:50,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:50,430 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-12-15 21:34:50,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 34 [2021-12-15 21:34:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 170 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:34:51,076 INFO L328 TraceCheckSpWp]: Computing backward predicates...