./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifeqn2.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 cb71614531ba069deddebdade1f57f90be50d3de3732c63efbb92b9f6b8c62e1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:04:07,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:04:07,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:04:07,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:04:07,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:04:07,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:04:07,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:04:07,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:04:07,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:04:07,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:04:07,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:04:07,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:04:07,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:04:07,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:04:07,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:04:07,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:04:07,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:04:07,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:04:07,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:04:07,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:04:07,822 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:04:07,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:04:07,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:04:07,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:04:07,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:04:07,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:04:07,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:04:07,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:04:07,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:04:07,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:04:07,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:04:07,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:04:07,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:04:07,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:04:07,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:04:07,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:04:07,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:04:07,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:04:07,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:04:07,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:04:07,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:04:07,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:04:07,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:04:07,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:04:07,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:04:07,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:04:07,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:04:07,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:04:07,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:04:07,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:04:07,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:04:07,875 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:04:07,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:04:07,875 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:04:07,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:04:07,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:04:07,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:04:07,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:04:07,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:04:07,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:04:07,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:04:07,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:04:07,884 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:04:07,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:04:07,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:04:07,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:04:07,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:04:07,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:04:07,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:04:07,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:04:07,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:04:07,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:04:07,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:04:07,886 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:04:07,886 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:04:07,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:04:07,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb71614531ba069deddebdade1f57f90be50d3de3732c63efbb92b9f6b8c62e1 [2022-07-20 22:04:08,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:04:08,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:04:08,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:04:08,168 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:04:08,172 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:04:08,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn2.c [2022-07-20 22:04:08,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e5320f8/778b0bb71f6a4a858a4e212c3802e0ec/FLAGe213af14e [2022-07-20 22:04:08,622 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:04:08,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn2.c [2022-07-20 22:04:08,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e5320f8/778b0bb71f6a4a858a4e212c3802e0ec/FLAGe213af14e [2022-07-20 22:04:08,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e5320f8/778b0bb71f6a4a858a4e212c3802e0ec [2022-07-20 22:04:08,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:04:08,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:04:08,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:04:08,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:04:08,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:04:08,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:08,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191b7423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08, skipping insertion in model container [2022-07-20 22:04:08,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:08,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:04:08,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:04:08,837 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/ifeqn2.c[589,602] [2022-07-20 22:04:08,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:04:08,884 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:04:08,897 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/ifeqn2.c[589,602] [2022-07-20 22:04:08,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:04:08,927 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:04:08,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08 WrapperNode [2022-07-20 22:04:08,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:04:08,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:04:08,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:04:08,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:04:08,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:08,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:08,958 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-07-20 22:04:08,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:04:08,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:04:08,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:04:08,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:04:08,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:08,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:08,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:08,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:08,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:09,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:09,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:09,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:04:09,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:04:09,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:04:09,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:04:09,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (1/1) ... [2022-07-20 22:04:09,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:04:09,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:09,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 22:04:09,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 22:04:09,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:04:09,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:04:09,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:04:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:04:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:04:09,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:04:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:04:09,138 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:04:09,139 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:04:09,266 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:04:09,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:04:09,271 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 22:04:09,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:04:09 BoogieIcfgContainer [2022-07-20 22:04:09,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:04:09,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:04:09,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:04:09,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:04:09,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:04:08" (1/3) ... [2022-07-20 22:04:09,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b699ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:04:09, skipping insertion in model container [2022-07-20 22:04:09,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:04:08" (2/3) ... [2022-07-20 22:04:09,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b699ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:04:09, skipping insertion in model container [2022-07-20 22:04:09,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:04:09" (3/3) ... [2022-07-20 22:04:09,280 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2022-07-20 22:04:09,292 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:04:09,293 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:04:09,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:04:09,336 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e60860d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@8b8b09e [2022-07-20 22:04:09,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:04:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 22:04:09,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:09,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:09,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-07-20 22:04:09,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:09,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749856208] [2022-07-20 22:04:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:09,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:04:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:09,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:09,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749856208] [2022-07-20 22:04:09,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749856208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:04:09,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:04:09,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:04:09,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480183619] [2022-07-20 22:04:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:04:09,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 22:04:09,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 22:04:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 22:04:09,525 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 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) [2022-07-20 22:04:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:09,544 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-07-20 22:04:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 22:04:09,546 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 [2022-07-20 22:04:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:09,554 INFO L225 Difference]: With dead ends: 42 [2022-07-20 22:04:09,554 INFO L226 Difference]: Without dead ends: 19 [2022-07-20 22:04:09,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 22:04:09,565 INFO L413 NwaCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:09,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:04:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-20 22:04:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-20 22:04:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-20 22:04:09,598 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-07-20 22:04:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:09,599 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-20 22:04:09,600 INFO L496 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) [2022-07-20 22:04:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-20 22:04:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 22:04:09,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:09,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:09,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:04:09,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:09,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:09,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-07-20 22:04:09,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:09,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608173965] [2022-07-20 22:04:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:04:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:09,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:09,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608173965] [2022-07-20 22:04:09,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608173965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:04:09,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:04:09,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:04:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308374674] [2022-07-20 22:04:09,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:04:09,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:04:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:09,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:04:09,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:04:09,780 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:09,854 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-07-20 22:04:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:04:09,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 22:04:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:09,857 INFO L225 Difference]: With dead ends: 45 [2022-07-20 22:04:09,858 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 22:04:09,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:04:09,862 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:09,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:04:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 22:04:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-07-20 22:04:09,874 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) [2022-07-20 22:04:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-20 22:04:09,876 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-20 22:04:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:09,877 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-20 22:04:09,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-20 22:04:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 22:04:09,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:09,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:04:09,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:09,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-07-20 22:04:09,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921781607] [2022-07-20 22:04:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:09,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:09,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164901031] [2022-07-20 22:04:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:09,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:09,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:09,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:04:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:04:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:04:10,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:10,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:04:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:04:10,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:04:10,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:10,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921781607] [2022-07-20 22:04:10,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:10,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164901031] [2022-07-20 22:04:10,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164901031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:04:10,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:04:10,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:04:10,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330038387] [2022-07-20 22:04:10,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:04:10,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:04:10,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:10,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:04:10,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:04:10,145 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:10,213 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-07-20 22:04:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:04:10,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 22:04:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:10,216 INFO L225 Difference]: With dead ends: 40 [2022-07-20 22:04:10,216 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 22:04:10,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:04:10,220 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:10,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:04:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 22:04:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-20 22:04:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-20 22:04:10,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-07-20 22:04:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:10,235 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-20 22:04:10,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-20 22:04:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 22:04:10,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:10,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:10,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 22:04:10,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:10,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:10,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-07-20 22:04:10,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:10,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776162168] [2022-07-20 22:04:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:10,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:10,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:10,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053737546] [2022-07-20 22:04:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:10,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:10,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:10,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:04:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:04:10,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:04:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:10,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:10,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776162168] [2022-07-20 22:04:10,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:10,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053737546] [2022-07-20 22:04:10,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053737546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:10,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:10,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-20 22:04:10,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540976548] [2022-07-20 22:04:10,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:10,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:04:10,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:10,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:04:10,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:04:10,682 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:10,798 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-07-20 22:04:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:04:10,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 21 [2022-07-20 22:04:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:10,799 INFO L225 Difference]: With dead ends: 70 [2022-07-20 22:04:10,800 INFO L226 Difference]: Without dead ends: 43 [2022-07-20 22:04:10,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:04:10,801 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:10,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:04:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-20 22:04:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-07-20 22:04:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-20 22:04:10,806 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-07-20 22:04:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:10,806 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-20 22:04:10,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-20 22:04:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 22:04:10,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:10,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:10,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:11,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-20 22:04:11,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:11,023 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-07-20 22:04:11,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:11,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484407423] [2022-07-20 22:04:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:11,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:11,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583052983] [2022-07-20 22:04:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:11,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:11,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:11,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:11,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:04:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:04:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 22:04:11,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:11,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:04:11,196 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-20 22:04:11,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 22:04:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:04:11,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:11,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-20 22:04:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:04:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:11,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484407423] [2022-07-20 22:04:11,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:11,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583052983] [2022-07-20 22:04:11,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583052983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:11,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:11,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2022-07-20 22:04:11,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45662154] [2022-07-20 22:04:11,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:11,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:04:11,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:04:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:04:11,480 INFO L87 Difference]: Start difference. First operand 27 states and 31 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) [2022-07-20 22:04:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:11,667 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-07-20 22:04:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 22:04:11,667 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 [2022-07-20 22:04:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:11,668 INFO L225 Difference]: With dead ends: 73 [2022-07-20 22:04:11,668 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 22:04:11,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:04:11,669 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:11,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-07-20 22:04:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 22:04:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2022-07-20 22:04:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-07-20 22:04:11,677 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2022-07-20 22:04:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:11,677 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-07-20 22:04:11,678 INFO L496 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) [2022-07-20 22:04:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-07-20 22:04:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 22:04:11,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:11,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:11,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:11,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:11,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-07-20 22:04:11,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116143056] [2022-07-20 22:04:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:11,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:11,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:11,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582683255] [2022-07-20 22:04:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:11,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:11,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:11,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:11,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:04:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:04:12,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 22:04:12,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:12,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 22:04:12,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:04:12,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:12,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 22:04:12,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-20 22:04:12,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:12,258 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:04:12,258 INFO L390 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 38 treesize of output 32 [2022-07-20 22:04:12,451 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 22:04:12,452 INFO L390 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 66 treesize of output 38 [2022-07-20 22:04:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:12,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:13,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:13,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116143056] [2022-07-20 22:04:13,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:13,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582683255] [2022-07-20 22:04:13,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582683255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:13,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:13,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-07-20 22:04:13,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853280338] [2022-07-20 22:04:13,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:13,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 22:04:13,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 22:04:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-07-20 22:04:13,111 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:41,060 WARN L233 SmtUtils]: Spent 26.56s on a formula simplification. DAG size of input: 89 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 22:04:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:41,862 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-07-20 22:04:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 22:04:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-20 22:04:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:41,865 INFO L225 Difference]: With dead ends: 124 [2022-07-20 22:04:41,865 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 22:04:41,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 22:04:41,867 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:41,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 221 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-07-20 22:04:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 22:04:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2022-07-20 22:04:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2022-07-20 22:04:41,882 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 28 [2022-07-20 22:04:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:41,882 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2022-07-20 22:04:41,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2022-07-20 22:04:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 22:04:41,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:41,884 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:41,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:42,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:42,092 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash -849177916, now seen corresponding path program 2 times [2022-07-20 22:04:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:42,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18957192] [2022-07-20 22:04:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:42,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:42,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:42,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661938860] [2022-07-20 22:04:42,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:04:42,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:42,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:42,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:42,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:04:42,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:04:42,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:04:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:04:42,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:04:42,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:04:42,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18957192] [2022-07-20 22:04:42,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661938860] [2022-07-20 22:04:42,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661938860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:04:42,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:04:42,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:04:42,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390742569] [2022-07-20 22:04:42,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:04:42,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:04:42,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:04:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:04:42,239 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:42,298 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2022-07-20 22:04:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:04:42,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-20 22:04:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:42,300 INFO L225 Difference]: With dead ends: 121 [2022-07-20 22:04:42,300 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 22:04:42,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:04:42,301 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:42,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:04:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 22:04:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-07-20 22:04:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-07-20 22:04:42,324 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 30 [2022-07-20 22:04:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:42,326 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-07-20 22:04:42,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-07-20 22:04:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 22:04:42,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:42,331 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:42,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:42,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:42,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1242204926, now seen corresponding path program 3 times [2022-07-20 22:04:42,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:42,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411153145] [2022-07-20 22:04:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:42,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:42,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:42,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111224111] [2022-07-20 22:04:42,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:04:42,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:42,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:42,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:42,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:04:42,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 22:04:42,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:04:42,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 22:04:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:04:42,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:04:43,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411153145] [2022-07-20 22:04:43,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:43,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111224111] [2022-07-20 22:04:43,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111224111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:43,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:43,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2022-07-20 22:04:43,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107520395] [2022-07-20 22:04:43,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:43,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 22:04:43,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 22:04:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:04:43,098 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:43,442 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-07-20 22:04:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 22:04:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-20 22:04:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:43,443 INFO L225 Difference]: With dead ends: 116 [2022-07-20 22:04:43,443 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 22:04:43,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2022-07-20 22:04:43,444 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:43,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 56 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:04:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 22:04:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2022-07-20 22:04:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-07-20 22:04:43,458 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 30 [2022-07-20 22:04:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:43,459 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-07-20 22:04:43,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-07-20 22:04:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:04:43,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:43,461 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:43,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:43,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:43,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2022-07-20 22:04:43,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:43,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738236243] [2022-07-20 22:04:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:43,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:43,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:43,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52312823] [2022-07-20 22:04:43,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:04:43,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:43,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:43,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:04:43,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:04:43,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:04:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:04:43,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:04:43,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:04:43,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:43,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738236243] [2022-07-20 22:04:43,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:43,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52312823] [2022-07-20 22:04:43,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52312823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:43,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:43,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-20 22:04:43,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226315604] [2022-07-20 22:04:43,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:43,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 22:04:43,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 22:04:43,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:04:43,880 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:44,039 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-07-20 22:04:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:04:44,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 22:04:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:44,041 INFO L225 Difference]: With dead ends: 102 [2022-07-20 22:04:44,041 INFO L226 Difference]: Without dead ends: 77 [2022-07-20 22:04:44,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-20 22:04:44,042 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:44,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 69 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:04:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-20 22:04:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2022-07-20 22:04:44,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:44,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-07-20 22:04:44,049 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 32 [2022-07-20 22:04:44,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:44,049 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-07-20 22:04:44,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-07-20 22:04:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 22:04:44,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:44,050 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:44,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:44,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:44,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1847758638, now seen corresponding path program 4 times [2022-07-20 22:04:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:44,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428681669] [2022-07-20 22:04:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:44,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:44,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:44,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991155198] [2022-07-20 22:04:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:04:44,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:44,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:44,300 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:44,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:04:44,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:04:44,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:04:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:04:44,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:44,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:44,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:44,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428681669] [2022-07-20 22:04:44,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:44,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991155198] [2022-07-20 22:04:44,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991155198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:44,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:44,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-20 22:04:44,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350672086] [2022-07-20 22:04:44,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:44,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 22:04:44,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:44,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 22:04:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:04:44,527 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:44,778 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-07-20 22:04:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:04:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 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 33 [2022-07-20 22:04:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:44,780 INFO L225 Difference]: With dead ends: 116 [2022-07-20 22:04:44,780 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 22:04:44,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-20 22:04:44,781 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 225 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:44,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 105 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:04:44,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 22:04:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2022-07-20 22:04:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-07-20 22:04:44,788 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 33 [2022-07-20 22:04:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:44,788 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-07-20 22:04:44,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-07-20 22:04:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 22:04:44,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:44,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:44,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:45,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 22:04:45,008 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 3 times [2022-07-20 22:04:45,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:45,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940462148] [2022-07-20 22:04:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:45,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:45,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080357095] [2022-07-20 22:04:45,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:04:45,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:45,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:45,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 22:04:45,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 22:04:45,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:04:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 22:04:45,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:45,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 22:04:45,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:04:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:45,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 22:04:45,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:45,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 22:04:45,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-20 22:04:45,818 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 22:04:45,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-20 22:04:45,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:04:45,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:45,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:45,834 INFO L390 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 120 treesize of output 194 [2022-07-20 22:04:46,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:46,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:46,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:46,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:46,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:04:46,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:04:46,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:46,088 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-20 22:04:46,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 75 [2022-07-20 22:04:46,365 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 22:04:46,365 INFO L390 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 56 treesize of output 32 [2022-07-20 22:04:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:46,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:48,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:48,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940462148] [2022-07-20 22:04:48,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:48,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080357095] [2022-07-20 22:04:48,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080357095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:48,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:48,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2022-07-20 22:04:48,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296498225] [2022-07-20 22:04:48,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:48,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 22:04:48,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:48,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 22:04:48,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 22:04:48,343 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:50,657 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2022-07-20 22:04:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-20 22:04:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-20 22:04:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:50,659 INFO L225 Difference]: With dead ends: 104 [2022-07-20 22:04:50,659 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 22:04:50,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=864, Invalid=3692, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 22:04:50,662 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 103 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:50,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 85 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 216 Invalid, 0 Unknown, 268 Unchecked, 0.3s Time] [2022-07-20 22:04:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 22:04:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-07-20 22:04:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2022-07-20 22:04:50,672 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 34 [2022-07-20 22:04:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:50,672 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2022-07-20 22:04:50,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2022-07-20 22:04:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 22:04:50,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:50,673 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:50,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:50,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:50,887 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:50,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:50,888 INFO L85 PathProgramCache]: Analyzing trace with hash -653025448, now seen corresponding path program 4 times [2022-07-20 22:04:50,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:50,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248552763] [2022-07-20 22:04:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:50,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:50,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:50,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750248536] [2022-07-20 22:04:50,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:04:50,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:50,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:50,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:50,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 22:04:50,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:04:50,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:04:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 22:04:50,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:04:51,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:04:51,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:51,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248552763] [2022-07-20 22:04:51,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:51,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750248536] [2022-07-20 22:04:51,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750248536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:51,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:51,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-20 22:04:51,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944227433] [2022-07-20 22:04:51,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:51,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 22:04:51,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 22:04:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:04:51,115 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:51,415 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-07-20 22:04:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:04:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-20 22:04:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:51,416 INFO L225 Difference]: With dead ends: 123 [2022-07-20 22:04:51,416 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 22:04:51,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-07-20 22:04:51,417 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 155 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:51,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 112 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:04:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 22:04:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 61. [2022-07-20 22:04:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-20 22:04:51,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 34 [2022-07-20 22:04:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:51,426 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-20 22:04:51,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-20 22:04:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 22:04:51,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:51,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:51,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:51,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 22:04:51,627 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:51,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1259217666, now seen corresponding path program 5 times [2022-07-20 22:04:51,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035362739] [2022-07-20 22:04:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:51,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:51,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:51,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697599070] [2022-07-20 22:04:51,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:04:51,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:51,663 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:51,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 22:04:52,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 22:04:52,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:04:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 22:04:52,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:52,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:04:52,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:52,601 INFO L390 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 25 treesize of output 24 [2022-07-20 22:04:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:52,639 INFO L390 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 25 treesize of output 24 [2022-07-20 22:04:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:52,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 22:04:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:04:52,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:04:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 22:04:53,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:04:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035362739] [2022-07-20 22:04:53,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:04:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697599070] [2022-07-20 22:04:53,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697599070] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:04:53,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:04:53,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-07-20 22:04:53,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207336011] [2022-07-20 22:04:53,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:04:53,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 22:04:53,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:04:53,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 22:04:53,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-07-20 22:04:53,095 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:04:53,416 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2022-07-20 22:04:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 22:04:53,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 22:04:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:04:53,417 INFO L225 Difference]: With dead ends: 119 [2022-07-20 22:04:53,417 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 22:04:53,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-07-20 22:04:53,418 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:04:53,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 168 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 242 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-07-20 22:04:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 22:04:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 76. [2022-07-20 22:04:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-07-20 22:04:53,427 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 36 [2022-07-20 22:04:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:04:53,428 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-07-20 22:04:53,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:04:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-07-20 22:04:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 22:04:53,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:04:53,428 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:04:53,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 22:04:53,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 22:04:53,634 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:04:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:04:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 5 times [2022-07-20 22:04:53,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:04:53,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102942614] [2022-07-20 22:04:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:04:53,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:04:53,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:04:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717734298] [2022-07-20 22:04:53,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:04:53,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:04:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:04:53,649 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:04:53,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 22:04:53,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 22:04:53,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:04:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 22:04:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:04:53,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 22:04:53,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:04:53,953 INFO L390 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 110 treesize of output 99 [2022-07-20 22:04:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:53,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:04:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:53,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:53,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:53,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:53,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:53,965 INFO L390 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 98 treesize of output 172 [2022-07-20 22:04:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-20 22:04:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-07-20 22:04:54,226 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 22:04:54,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 137 [2022-07-20 22:04:54,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:04:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,236 INFO L390 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 123 treesize of output 197 [2022-07-20 22:04:54,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 59 [2022-07-20 22:04:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:04:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:04:54,389 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-20 22:04:54,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 56 [2022-07-20 22:04:54,809 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-20 22:04:54,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 48 [2022-07-20 22:04:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:04:54,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:06:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:06:14,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102942614] [2022-07-20 22:06:14,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:06:14,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717734298] [2022-07-20 22:06:14,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717734298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:06:14,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:06:14,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-07-20 22:06:14,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957176363] [2022-07-20 22:06:14,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:06:14,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 22:06:14,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:06:14,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 22:06:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=998, Unknown=19, NotChecked=0, Total=1190 [2022-07-20 22:06:14,035 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:34,797 WARN L233 SmtUtils]: Spent 18.95s on a formula simplification. DAG size of input: 226 DAG size of output: 224 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 22:06:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:06:42,256 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2022-07-20 22:06:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 22:06:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-20 22:06:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:06:42,257 INFO L225 Difference]: With dead ends: 97 [2022-07-20 22:06:42,257 INFO L226 Difference]: Without dead ends: 73 [2022-07-20 22:06:42,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 97.7s TimeCoverageRelationStatistics Valid=408, Invalid=1735, Unknown=19, NotChecked=0, Total=2162 [2022-07-20 22:06:42,259 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 89 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:06:42,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 190 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 379 Invalid, 0 Unknown, 272 Unchecked, 1.7s Time] [2022-07-20 22:06:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-20 22:06:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2022-07-20 22:06:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-07-20 22:06:42,266 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 38 [2022-07-20 22:06:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:06:42,267 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-07-20 22:06:42,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-07-20 22:06:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 22:06:42,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:06:42,268 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:06:42,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 22:06:42,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 22:06:42,476 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:06:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:06:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 173090424, now seen corresponding path program 6 times [2022-07-20 22:06:42,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:06:42,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795553448] [2022-07-20 22:06:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:06:42,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:06:42,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:06:42,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218932380] [2022-07-20 22:06:42,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 22:06:42,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:06:42,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:06:42,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:06:42,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 22:06:43,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 22:06:43,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:06:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 22:06:43,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:06:43,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 22:06:43,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:06:43,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 22:06:43,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 22:06:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 22:06:43,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-20 22:06:43,410 INFO L390 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 0 case distinctions, treesize of input 139 treesize of output 127 [2022-07-20 22:06:43,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:43,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,423 INFO L390 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 120 treesize of output 194 [2022-07-20 22:06:43,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:43,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 68 [2022-07-20 22:06:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:43,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-07-20 22:06:44,181 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 22:06:44,182 INFO L390 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 56 treesize of output 32 [2022-07-20 22:06:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:44,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:06:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:52,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:06:52,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795553448] [2022-07-20 22:06:52,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:06:52,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218932380] [2022-07-20 22:06:52,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218932380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:06:52,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:06:52,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 42 [2022-07-20 22:06:52,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553644782] [2022-07-20 22:06:52,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:06:52,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 22:06:52,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:06:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 22:06:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 22:06:52,733 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:06:57,834 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2022-07-20 22:06:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 22:06:57,834 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-20 22:06:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:06:57,835 INFO L225 Difference]: With dead ends: 122 [2022-07-20 22:06:57,835 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 22:06:57,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=334, Invalid=1922, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 22:06:57,837 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:06:57,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 125 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 106 Invalid, 0 Unknown, 359 Unchecked, 0.2s Time] [2022-07-20 22:06:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 22:06:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2022-07-20 22:06:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 107 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2022-07-20 22:06:57,851 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 40 [2022-07-20 22:06:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:06:57,852 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2022-07-20 22:06:57,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2022-07-20 22:06:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:06:57,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:06:57,853 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:06:57,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 22:06:58,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 22:06:58,059 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:06:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:06:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1596358930, now seen corresponding path program 7 times [2022-07-20 22:06:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:06:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203384010] [2022-07-20 22:06:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:06:58,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:06:58,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:06:58,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074820954] [2022-07-20 22:06:58,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 22:06:58,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:06:58,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:06:58,084 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:06:58,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 22:06:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:06:58,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 22:06:58,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:06:58,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 22:06:58,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:06:58,590 INFO L390 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 110 treesize of output 99 [2022-07-20 22:06:58,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:58,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,599 INFO L390 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 98 treesize of output 172 [2022-07-20 22:06:58,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 77 [2022-07-20 22:06:58,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2022-07-20 22:06:58,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-07-20 22:06:58,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:58,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-07-20 22:06:59,004 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 22:06:59,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 141 [2022-07-20 22:06:59,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,014 INFO L390 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 123 treesize of output 197 [2022-07-20 22:06:59,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 42 [2022-07-20 22:06:59,194 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 22:06:59,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 147 [2022-07-20 22:06:59,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:59,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 213 [2022-07-20 22:06:59,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 69 [2022-07-20 22:06:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:59,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:59,544 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-20 22:06:59,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 70 [2022-07-20 22:06:59,853 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-20 22:06:59,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 42 [2022-07-20 22:06:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:59,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:07:30,037 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 122 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 22:07:35,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11379658 treesize of output 11267018 [2022-07-20 22:07:55,489 WARN L233 SmtUtils]: Spent 20.40s on a formula simplification that was a NOOP. DAG size: 2304 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-20 22:07:55,628 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-20 22:07:55,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11902922 treesize of output 11434954