./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn4.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 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:34:52,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:34:52,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:34:52,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:34:52,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:34:52,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:34:52,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:34:52,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:34:52,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:34:52,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:34:52,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:34:52,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:34:52,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:34:52,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:34:52,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:34:52,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:34:52,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:34:52,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:34:52,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:34:52,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:34:52,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:34:52,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:34:52,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:34:52,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:34:52,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:34:52,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:34:52,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:34:52,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:34:52,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:34:52,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:34:52,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:34:52,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:34:52,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:34:52,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:34:52,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:34:52,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:34:52,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:34:52,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:34:52,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:34:52,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:34:52,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:34:52,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:34:52,838 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:34:52,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:34:52,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:34:52,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:34:52,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:34:52,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:34:52,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:34:52,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:34:52,841 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:34:52,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:34:52,841 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:34:52,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:34:52,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:34:52,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:34:52,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:34:52,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:34:52,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:34:52,843 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:34:52,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:34:52,843 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:34:52,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:34:52,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:34:52,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:34:52,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:34:52,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:34:52,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:34:52,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:34:52,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:34:52,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:34:52,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:34:52,845 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:34:52,845 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:34:52,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:34:52,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:34:52,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a [2021-12-14 11:34:53,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:34:53,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:34:53,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:34:53,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:34:53,081 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:34:53,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4.c [2021-12-14 11:34:53,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce6e359cb/96bc777751d54a43b9a0e7d30bd78dd9/FLAG60f2a6400 [2021-12-14 11:34:53,559 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:34:53,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c [2021-12-14 11:34:53,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce6e359cb/96bc777751d54a43b9a0e7d30bd78dd9/FLAG60f2a6400 [2021-12-14 11:34:53,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce6e359cb/96bc777751d54a43b9a0e7d30bd78dd9 [2021-12-14 11:34:53,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:34:53,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:34:53,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:34:53,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:34:53,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:34:53,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27fb0933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53, skipping insertion in model container [2021-12-14 11:34:53,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:34:53,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:34:53,762 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-fpi/eqn4.c[587,600] [2021-12-14 11:34:53,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:34:53,792 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:34:53,801 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-fpi/eqn4.c[587,600] [2021-12-14 11:34:53,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:34:53,816 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:34:53,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53 WrapperNode [2021-12-14 11:34:53,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:34:53,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:34:53,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:34:53,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:34:53,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,840 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-12-14 11:34:53,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:34:53,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:34:53,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:34:53,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:34:53,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:34:53,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:34:53,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:34:53,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:34:53,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (1/1) ... [2021-12-14 11:34:53,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:34:53,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:53,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 11:34:53,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 11:34:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:34:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:34:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:34:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 11:34:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:34:53,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:34:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:34:53,975 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:34:53,976 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:34:54,148 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:34:54,152 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:34:54,152 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 11:34:54,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:34:54 BoogieIcfgContainer [2021-12-14 11:34:54,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:34:54,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:34:54,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:34:54,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:34:54,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:34:53" (1/3) ... [2021-12-14 11:34:54,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e83a713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:34:54, skipping insertion in model container [2021-12-14 11:34:54,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:53" (2/3) ... [2021-12-14 11:34:54,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e83a713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:34:54, skipping insertion in model container [2021-12-14 11:34:54,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:34:54" (3/3) ... [2021-12-14 11:34:54,158 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn4.c [2021-12-14 11:34:54,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:34:54,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:34:54,186 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:34:54,190 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 11:34:54,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:34:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 11:34:54,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:54,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:54,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:54,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-12-14 11:34:54,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:54,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592335865] [2021-12-14 11:34:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:54,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:54,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:54,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592335865] [2021-12-14 11:34:54,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592335865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:34:54,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:34:54,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 11:34:54,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643254573] [2021-12-14 11:34:54,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:34:54,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 11:34:54,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:54,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 11:34:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:34:54,321 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:54,329 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-12-14 11:34:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 11:34:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 11:34:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:54,334 INFO L225 Difference]: With dead ends: 38 [2021-12-14 11:34:54,334 INFO L226 Difference]: Without dead ends: 17 [2021-12-14 11:34:54,336 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 [2021-12-14 11:34:54,338 INFO L933 BasicCegarLoop]: 24 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, 24 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 [2021-12-14 11:34:54,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-14 11:34:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-14 11:34:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-14 11:34:54,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-12-14 11:34:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:54,356 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-14 11:34:54,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-14 11:34:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 11:34:54,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:54,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:54,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:34:54,357 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-12-14 11:34:54,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676475880] [2021-12-14 11:34:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:54,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:54,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:34:54,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092192976] [2021-12-14 11:34:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:54,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:54,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:54,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:34:54,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:34:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:54,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 11:34:54,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:54,564 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-14 11:34:54,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-14 11:34:54,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-12-14 11:34:54,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-12-14 11:34:54,705 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 11 [2021-12-14 11:34:54,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 11:34:54,738 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 5 treesize of output 3 [2021-12-14 11:34:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:54,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:34:54,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:54,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676475880] [2021-12-14 11:34:54,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:34:54,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092192976] [2021-12-14 11:34:54,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092192976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:34:54,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:34:54,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:34:54,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410364793] [2021-12-14 11:34:54,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:34:54,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:34:54,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:54,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:34:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:34:54,787 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:54,848 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-14 11:34:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:34:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 11:34:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:54,849 INFO L225 Difference]: With dead ends: 34 [2021-12-14 11:34:54,849 INFO L226 Difference]: Without dead ends: 32 [2021-12-14 11:34:54,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:34:54,850 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:54,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-14 11:34:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-12-14 11:34:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-14 11:34:54,855 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-12-14 11:34:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:54,855 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-14 11:34:54,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-14 11:34:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 11:34:54,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:54,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:54,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 11:34:55,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:55,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-12-14 11:34:55,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:55,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238375093] [2021-12-14 11:34:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:55,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:55,113 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:34:55,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280128572] [2021-12-14 11:34:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:55,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:55,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:55,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:34:55,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:34:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:55,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:34:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:55,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:34:55,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:55,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238375093] [2021-12-14 11:34:55,214 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:34:55,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280128572] [2021-12-14 11:34:55,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280128572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:34:55,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:34:55,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:34:55,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248983651] [2021-12-14 11:34:55,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:34:55,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:34:55,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:55,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:34:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:34:55,218 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:55,281 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-12-14 11:34:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:34:55,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-14 11:34:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:55,283 INFO L225 Difference]: With dead ends: 49 [2021-12-14 11:34:55,283 INFO L226 Difference]: Without dead ends: 40 [2021-12-14 11:34:55,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:34:55,289 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:55,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-14 11:34:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-12-14 11:34:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-14 11:34:55,298 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-12-14 11:34:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:55,298 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-14 11:34:55,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-14 11:34:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 11:34:55,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:55,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:55,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 11:34:55,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 11:34:55,500 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:55,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:55,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-12-14 11:34:55,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:55,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428963895] [2021-12-14 11:34:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:55,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:55,528 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:34:55,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032057871] [2021-12-14 11:34:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:55,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:55,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:55,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:34:55,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:34:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:34:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:55,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:34:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:55,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:55,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428963895] [2021-12-14 11:34:55,674 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:34:55,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032057871] [2021-12-14 11:34:55,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032057871] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:34:55,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:34:55,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-14 11:34:55,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853313169] [2021-12-14 11:34:55,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:34:55,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:34:55,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:55,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:34:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:34:55,678 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:55,748 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-14 11:34:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 11:34:55,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-14 11:34:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:55,749 INFO L225 Difference]: With dead ends: 44 [2021-12-14 11:34:55,749 INFO L226 Difference]: Without dead ends: 37 [2021-12-14 11:34:55,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-14 11:34:55,754 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:55,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:55,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-14 11:34:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-12-14 11:34:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-14 11:34:55,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-12-14 11:34:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:55,759 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-14 11:34:55,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:55,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-14 11:34:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 11:34:55,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:55,760 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:55,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 11:34:55,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:55,978 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-12-14 11:34:55,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:55,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252383863] [2021-12-14 11:34:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:55,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:55,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:34:55,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922970142] [2021-12-14 11:34:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:55,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:55,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:55,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:34:56,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:34:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:56,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 11:34:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:56,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:34:56,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:56,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252383863] [2021-12-14 11:34:56,096 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:34:56,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922970142] [2021-12-14 11:34:56,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922970142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:34:56,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:34:56,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 11:34:56,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538538576] [2021-12-14 11:34:56,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:34:56,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:34:56,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:56,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:34:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:34:56,098 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:56,145 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-12-14 11:34:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 11:34:56,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 11:34:56,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:56,146 INFO L225 Difference]: With dead ends: 41 [2021-12-14 11:34:56,146 INFO L226 Difference]: Without dead ends: 27 [2021-12-14 11:34:56,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:34:56,146 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:56,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-14 11:34:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-12-14 11:34:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-14 11:34:56,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-12-14 11:34:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:56,164 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-14 11:34:56,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-14 11:34:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 11:34:56,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:56,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:56,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:34:56,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:56,377 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:56,377 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-12-14 11:34:56,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:56,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535297264] [2021-12-14 11:34:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:56,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:56,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:34:56,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621766940] [2021-12-14 11:34:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:56,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:56,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:56,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:34:56,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:34:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:56,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 11:34:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:56,491 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 10 treesize of output 8 [2021-12-14 11:34:56,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:56,496 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 14 treesize of output 14 [2021-12-14 11:34:56,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-12-14 11:34:56,513 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 14 treesize of output 16 [2021-12-14 11:34:56,550 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 11:34:56,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 11:34:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:56,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:34:56,780 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_147) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2021-12-14 11:34:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-14 11:34:56,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:56,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535297264] [2021-12-14 11:34:56,792 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:34:56,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621766940] [2021-12-14 11:34:56,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621766940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:34:56,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:34:56,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-14 11:34:56,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793129600] [2021-12-14 11:34:56,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:34:56,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 11:34:56,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 11:34:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2021-12-14 11:34:56,794 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:56,860 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-14 11:34:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 11:34:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 11:34:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:56,861 INFO L225 Difference]: With dead ends: 35 [2021-12-14 11:34:56,861 INFO L226 Difference]: Without dead ends: 33 [2021-12-14 11:34:56,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=110, Unknown=1, NotChecked=22, Total=182 [2021-12-14 11:34:56,862 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:56,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 65 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-12-14 11:34:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-14 11:34:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2021-12-14 11:34:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-14 11:34:56,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2021-12-14 11:34:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:56,864 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-14 11:34:56,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-14 11:34:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 11:34:56,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:56,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:56,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 11:34:57,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:57,065 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-12-14 11:34:57,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:57,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79624751] [2021-12-14 11:34:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:57,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:57,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:34:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131789653] [2021-12-14 11:34:57,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:34:57,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:57,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:57,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:34:57,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:34:57,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:34:57,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:34:57,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 11:34:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:57,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:34:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:57,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:57,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79624751] [2021-12-14 11:34:57,203 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:34:57,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131789653] [2021-12-14 11:34:57,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131789653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:34:57,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:34:57,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-14 11:34:57,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939348309] [2021-12-14 11:34:57,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:34:57,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 11:34:57,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 11:34:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:34:57,205 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:57,281 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-12-14 11:34:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 11:34:57,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-14 11:34:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:57,282 INFO L225 Difference]: With dead ends: 60 [2021-12-14 11:34:57,282 INFO L226 Difference]: Without dead ends: 51 [2021-12-14 11:34:57,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:34:57,283 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:57,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 37 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:57,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-14 11:34:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-12-14 11:34:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-14 11:34:57,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2021-12-14 11:34:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:57,298 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-14 11:34:57,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-14 11:34:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 11:34:57,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:57,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:57,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 11:34:57,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:57,499 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-12-14 11:34:57,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:57,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598016911] [2021-12-14 11:34:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:57,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:57,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:34:57,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960802775] [2021-12-14 11:34:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:57,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:57,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:34:57,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:34:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 11:34:57,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:57,638 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-12-14 11:34:57,639 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2021-12-14 11:34:57,663 INFO L354 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2021-12-14 11:34:57,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2021-12-14 11:34:57,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-12-14 11:34:57,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-14 11:34:57,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 31 [2021-12-14 11:34:57,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 11:34:57,735 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 5 treesize of output 3 [2021-12-14 11:34:57,753 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 7 treesize of output 3 [2021-12-14 11:34:57,763 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 10 treesize of output 8 [2021-12-14 11:34:57,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:57,795 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 11:34:57,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-12-14 11:34:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:57,846 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-14 11:34:57,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 39 [2021-12-14 11:34:57,964 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 11:34:57,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2021-12-14 11:34:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:57,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:34:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:58,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598016911] [2021-12-14 11:34:58,313 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:34:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960802775] [2021-12-14 11:34:58,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960802775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:34:58,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:34:58,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-12-14 11:34:58,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191025610] [2021-12-14 11:34:58,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:34:58,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:34:58,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:34:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:34:58,315 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:58,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:58,568 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-14 11:34:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 11:34:58,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 11:34:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:58,569 INFO L225 Difference]: With dead ends: 48 [2021-12-14 11:34:58,569 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 11:34:58,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-12-14 11:34:58,570 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:58,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 89 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 79 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-12-14 11:34:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 11:34:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2021-12-14 11:34:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-14 11:34:58,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-12-14 11:34:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:58,574 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-14 11:34:58,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-14 11:34:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 11:34:58,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:58,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:58,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 11:34:58,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:58,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-12-14 11:34:58,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:58,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38899848] [2021-12-14 11:34:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:58,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:58,802 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:34:58,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243512400] [2021-12-14 11:34:58,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:34:58,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:58,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:58,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:34:58,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 11:34:58,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 11:34:58,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:34:58,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-14 11:34:58,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:59,017 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-14 11:34:59,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-14 11:34:59,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-12-14 11:34:59,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-12-14 11:34:59,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 11:34:59,044 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 5 treesize of output 3 [2021-12-14 11:34:59,057 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 10 treesize of output 8 [2021-12-14 11:34:59,081 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 14 treesize of output 16 [2021-12-14 11:34:59,150 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 14 treesize of output 16 [2021-12-14 11:34:59,196 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 56 treesize of output 49 [2021-12-14 11:34:59,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:59,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-14 11:34:59,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:59,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2021-12-14 11:34:59,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 49 [2021-12-14 11:34:59,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:59,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:59,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:59,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-14 11:34:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:34:59,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2021-12-14 11:34:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:59,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:34:59,631 WARN L838 $PredicateComparison]: unable to prove that (or (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_272 Int) (v_ArrVal_271 Int) (v_ArrVal_269 (Array Int Int))) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_269) |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) v_ArrVal_271) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16) v_ArrVal_272) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) is different from false [2021-12-14 11:34:59,638 WARN L838 $PredicateComparison]: unable to prove that (or (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_272 Int) (v_ArrVal_271 Int) (v_ArrVal_269 (Array Int Int))) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_269) |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) v_ArrVal_271) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16) v_ArrVal_272) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) is different from false [2021-12-14 11:34:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-14 11:34:59,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:59,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38899848] [2021-12-14 11:34:59,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:34:59,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243512400] [2021-12-14 11:34:59,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243512400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:34:59,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:34:59,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-12-14 11:34:59,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850824370] [2021-12-14 11:34:59,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:34:59,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 11:34:59,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:59,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 11:34:59,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=238, Unknown=2, NotChecked=70, Total=420 [2021-12-14 11:34:59,655 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:35:00,031 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2021-12-14 11:35:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 11:35:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 11:35:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:35:00,032 INFO L225 Difference]: With dead ends: 106 [2021-12-14 11:35:00,032 INFO L226 Difference]: Without dead ends: 97 [2021-12-14 11:35:00,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=581, Unknown=2, NotChecked=110, Total=930 [2021-12-14 11:35:00,033 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 105 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:35:00,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 196 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2021-12-14 11:35:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-14 11:35:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 45. [2021-12-14 11:35:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-14 11:35:00,038 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 20 [2021-12-14 11:35:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:35:00,038 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-14 11:35:00,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-14 11:35:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 11:35:00,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:35:00,039 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:35:00,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 11:35:00,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-14 11:35:00,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:35:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:35:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 4 times [2021-12-14 11:35:00,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:35:00,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984203915] [2021-12-14 11:35:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:35:00,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:35:00,291 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:35:00,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52035833] [2021-12-14 11:35:00,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:35:00,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:35:00,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:35:00,304 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:35:00,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 11:35:00,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:35:00,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:35:00,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:35:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:35:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:00,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:35:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:00,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:35:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984203915] [2021-12-14 11:35:00,461 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:35:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52035833] [2021-12-14 11:35:00,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52035833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:35:00,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:35:00,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-14 11:35:00,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609170833] [2021-12-14 11:35:00,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:35:00,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 11:35:00,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:35:00,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 11:35:00,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 11:35:00,465 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:35:00,607 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-12-14 11:35:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 11:35:00,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 11:35:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:35:00,607 INFO L225 Difference]: With dead ends: 87 [2021-12-14 11:35:00,607 INFO L226 Difference]: Without dead ends: 77 [2021-12-14 11:35:00,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-12-14 11:35:00,608 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:35:00,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 80 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:35:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-14 11:35:00,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 49. [2021-12-14 11:35:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-14 11:35:00,612 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 22 [2021-12-14 11:35:00,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:35:00,612 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-14 11:35:00,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-14 11:35:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 11:35:00,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:35:00,613 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:35:00,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-14 11:35:00,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 11:35:00,827 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:35:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:35:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2021-12-14 11:35:00,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:35:00,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593329120] [2021-12-14 11:35:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:35:00,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:35:00,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:35:00,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106320989] [2021-12-14 11:35:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:35:00,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:35:00,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:35:00,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:35:00,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 11:35:00,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:35:00,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:35:00,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 11:35:00,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:35:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:35:01,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:35:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:35:01,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:35:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593329120] [2021-12-14 11:35:01,079 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:35:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106320989] [2021-12-14 11:35:01,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106320989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:35:01,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:35:01,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-14 11:35:01,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256374957] [2021-12-14 11:35:01,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:35:01,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 11:35:01,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:35:01,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 11:35:01,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-14 11:35:01,080 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:35:01,171 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-12-14 11:35:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 11:35:01,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-14 11:35:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:35:01,172 INFO L225 Difference]: With dead ends: 72 [2021-12-14 11:35:01,172 INFO L226 Difference]: Without dead ends: 52 [2021-12-14 11:35:01,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-12-14 11:35:01,173 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:35:01,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 49 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:35:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-14 11:35:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2021-12-14 11:35:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-14 11:35:01,177 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 24 [2021-12-14 11:35:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:35:01,177 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-14 11:35:01,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:01,178 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-14 11:35:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 11:35:01,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:35:01,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:35:01,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 11:35:01,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 11:35:01,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:35:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:35:01,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 3 times [2021-12-14 11:35:01,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:35:01,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599176470] [2021-12-14 11:35:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:35:01,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:35:01,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:35:01,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693134588] [2021-12-14 11:35:01,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:35:01,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:35:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:35:01,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:35:01,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 11:35:01,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 11:35:01,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:35:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-14 11:35:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:35:01,616 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-12-14 11:35:01,617 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2021-12-14 11:35:01,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 31 [2021-12-14 11:35:01,655 INFO L354 Elim1Store]: treesize reduction 23, result has 54.0 percent of original size [2021-12-14 11:35:01,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 69 [2021-12-14 11:35:01,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-14 11:35:01,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 31 [2021-12-14 11:35:01,723 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 7 treesize of output 3 [2021-12-14 11:35:01,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 11:35:01,744 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 5 treesize of output 3 [2021-12-14 11:35:01,754 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 10 treesize of output 8 [2021-12-14 11:35:01,791 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-14 11:35:01,791 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 2 case distinctions, treesize of input 63 treesize of output 59 [2021-12-14 11:35:01,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-14 11:35:01,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2021-12-14 11:35:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 11:35:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-12-14 11:35:01,905 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-14 11:35:01,906 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 2 case distinctions, treesize of input 137 treesize of output 125 [2021-12-14 11:35:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:35:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 153 [2021-12-14 11:35:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 29 [2021-12-14 11:35:02,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:02,021 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 11:35:02,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2021-12-14 11:35:02,156 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 11:35:02,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2021-12-14 11:35:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:02,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:35:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:03,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:35:03,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599176470] [2021-12-14 11:35:03,890 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:35:03,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693134588] [2021-12-14 11:35:03,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693134588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:35:03,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:35:03,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-12-14 11:35:03,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693707159] [2021-12-14 11:35:03,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:35:03,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 11:35:03,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:35:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 11:35:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-12-14 11:35:03,891 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:35:04,215 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-12-14 11:35:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 11:35:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-14 11:35:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:35:04,217 INFO L225 Difference]: With dead ends: 63 [2021-12-14 11:35:04,217 INFO L226 Difference]: Without dead ends: 61 [2021-12-14 11:35:04,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-12-14 11:35:04,218 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:35:04,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 82 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 85 Unchecked, 0.0s Time] [2021-12-14 11:35:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-14 11:35:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2021-12-14 11:35:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-12-14 11:35:04,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 24 [2021-12-14 11:35:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:35:04,222 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-12-14 11:35:04,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-12-14 11:35:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 11:35:04,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:35:04,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:35:04,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 11:35:04,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 11:35:04,423 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:35:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:35:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 5 times [2021-12-14 11:35:04,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:35:04,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562107216] [2021-12-14 11:35:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:35:04,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:35:04,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:35:04,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099839196] [2021-12-14 11:35:04,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:35:04,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:35:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:35:04,438 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:35:04,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process