./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifcomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/ifcomp.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 0d2a65255d8b2e6b68882339bb2639d8ae744f5b340e0d3d33c067476b0c9dc7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:28:15,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:28:15,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:28:15,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:28:15,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:28:15,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:28:15,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:28:15,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:28:15,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:28:15,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:28:15,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:28:15,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:28:15,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:28:15,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:28:15,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:28:15,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:28:15,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:28:15,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:28:15,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:28:15,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:28:15,669 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:28:15,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:28:15,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:28:15,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:28:15,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:28:15,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:28:15,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:28:15,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:28:15,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:28:15,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:28:15,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:28:15,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:28:15,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:28:15,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:28:15,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:28:15,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:28:15,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:28:15,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:28:15,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:28:15,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:28:15,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:28:15,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:28:15,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:28:15,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:28:15,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:28:15,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:28:15,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:28:15,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:28:15,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:28:15,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:28:15,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:28:15,711 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:28:15,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:28:15,712 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:28:15,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:28:15,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:28:15,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:28:15,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:28:15,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:28:15,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:28:15,713 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:28:15,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:28:15,713 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:28:15,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:28:15,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:28:15,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:28:15,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:28:15,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:28:15,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:28:15,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:28:15,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:28:15,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:28:15,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:28:15,715 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:28:15,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:28:15,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:28:15,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d2a65255d8b2e6b68882339bb2639d8ae744f5b340e0d3d33c067476b0c9dc7 [2022-07-19 10:28:15,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:28:15,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:28:15,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:28:15,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:28:15,913 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:28:15,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcomp.c [2022-07-19 10:28:15,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1476e3b15/1d37061e7d904a3c8957f788f969f3dc/FLAGd989e6667 [2022-07-19 10:28:16,250 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:28:16,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcomp.c [2022-07-19 10:28:16,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1476e3b15/1d37061e7d904a3c8957f788f969f3dc/FLAGd989e6667 [2022-07-19 10:28:16,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1476e3b15/1d37061e7d904a3c8957f788f969f3dc [2022-07-19 10:28:16,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:28:16,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:28:16,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:28:16,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:28:16,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:28:16,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c2ce2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16, skipping insertion in model container [2022-07-19 10:28:16,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:28:16,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:28:16,921 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/ifcomp.c[589,602] [2022-07-19 10:28:16,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:28:16,939 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:28:16,946 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/ifcomp.c[589,602] [2022-07-19 10:28:16,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:28:16,960 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:28:16,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16 WrapperNode [2022-07-19 10:28:16,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:28:16,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:28:16,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:28:16,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:28:16,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,981 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2022-07-19 10:28:16,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:28:16,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:28:16,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:28:16,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:28:16,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:16,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:28:16,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:28:16,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:28:16,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:28:16,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (1/1) ... [2022-07-19 10:28:17,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:28:17,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:17,016 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) [2022-07-19 10:28:17,049 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 [2022-07-19 10:28:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:28:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:28:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:28:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:28:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:28:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:28:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:28:17,136 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:28:17,137 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:28:17,335 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:28:17,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:28:17,339 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 10:28:17,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:28:17 BoogieIcfgContainer [2022-07-19 10:28:17,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:28:17,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:28:17,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:28:17,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:28:17,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:28:16" (1/3) ... [2022-07-19 10:28:17,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ede9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:28:17, skipping insertion in model container [2022-07-19 10:28:17,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:28:16" (2/3) ... [2022-07-19 10:28:17,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ede9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:28:17, skipping insertion in model container [2022-07-19 10:28:17,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:28:17" (3/3) ... [2022-07-19 10:28:17,364 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcomp.c [2022-07-19 10:28:17,374 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:28:17,387 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:28:17,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:28:17,447 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@3ad5601f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3188535e [2022-07-19 10:28:17,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:28:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 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) [2022-07-19 10:28:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:28:17,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:17,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:17,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:17,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2022-07-19 10:28:17,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73835947] [2022-07-19 10:28:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:17,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:28:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:28:17,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73835947] [2022-07-19 10:28:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73835947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:28:17,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:28:17,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:28:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029371482] [2022-07-19 10:28:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:28:17,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:28:17,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:28:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:28:17,687 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:17,700 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2022-07-19 10:28:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:28:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:28:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:17,706 INFO L225 Difference]: With dead ends: 50 [2022-07-19 10:28:17,707 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 10:28:17,712 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 [2022-07-19 10:28:17,715 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-07-19 10:28:17,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:28:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 10:28:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 10:28:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-07-19 10:28:17,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2022-07-19 10:28:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:17,741 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-07-19 10:28:17,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-07-19 10:28:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:28:17,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:17,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:17,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:28:17,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2022-07-19 10:28:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:17,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208952793] [2022-07-19 10:28:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:17,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:28:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:28:17,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:17,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208952793] [2022-07-19 10:28:17,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208952793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:28:17,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:28:17,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:28:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257475654] [2022-07-19 10:28:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:28:17,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:28:17,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:17,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:28:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:28:17,849 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:17,917 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-07-19 10:28:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:28:17,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:28:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:17,918 INFO L225 Difference]: With dead ends: 56 [2022-07-19 10:28:17,918 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 10:28:17,921 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 [2022-07-19 10:28:17,923 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:17,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:28:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 10:28:17,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-07-19 10:28:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-19 10:28:17,935 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2022-07-19 10:28:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:17,936 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-19 10:28:17,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-19 10:28:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 10:28:17,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:17,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:17,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:28:17,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2022-07-19 10:28:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:17,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980125140] [2022-07-19 10:28:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:17,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:17,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:17,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914444691] [2022-07-19 10:28:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:17,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:17,971 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) [2022-07-19 10:28:18,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:28:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:28:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 10:28:18,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:18,088 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 [2022-07-19 10:28:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:28:18,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:28:18,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:18,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980125140] [2022-07-19 10:28:18,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:18,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914444691] [2022-07-19 10:28:18,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914444691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:28:18,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:28:18,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:28:18,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383086472] [2022-07-19 10:28:18,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:28:18,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:28:18,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:28:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:28:18,142 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2022-07-19 10:28:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:18,198 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-07-19 10:28:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:28:18,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) Word has length 23 [2022-07-19 10:28:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:18,200 INFO L225 Difference]: With dead ends: 46 [2022-07-19 10:28:18,200 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 10:28:18,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:28:18,204 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:18,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:28:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 10:28:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-07-19 10:28:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-07-19 10:28:18,213 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-07-19 10:28:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:18,213 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-07-19 10:28:18,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2022-07-19 10:28:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-07-19 10:28:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 10:28:18,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:18,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:18,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:28:18,432 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 [2022-07-19 10:28:18,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1659346963, now seen corresponding path program 1 times [2022-07-19 10:28:18,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:18,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921629411] [2022-07-19 10:28:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:18,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:18,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:18,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957873080] [2022-07-19 10:28:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:18,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:18,512 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) [2022-07-19 10:28:18,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:28:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:28:18,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:28:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:28:18,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:28:18,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:18,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921629411] [2022-07-19 10:28:18,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:18,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957873080] [2022-07-19 10:28:18,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957873080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:28:18,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:28:18,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:28:18,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537833760] [2022-07-19 10:28:18,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:28:18,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:28:18,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:18,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:28:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:28:18,655 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2022-07-19 10:28:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:18,786 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-07-19 10:28:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:28:18,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) Word has length 26 [2022-07-19 10:28:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:18,788 INFO L225 Difference]: With dead ends: 92 [2022-07-19 10:28:18,788 INFO L226 Difference]: Without dead ends: 53 [2022-07-19 10:28:18,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:28:18,789 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:18,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:28:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-19 10:28:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2022-07-19 10:28:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 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) [2022-07-19 10:28:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-19 10:28:18,792 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2022-07-19 10:28:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:18,793 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-19 10:28:18,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2022-07-19 10:28:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-19 10:28:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 10:28:18,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:18,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:18,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:28:19,010 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 [2022-07-19 10:28:19,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:19,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash -643446870, now seen corresponding path program 1 times [2022-07-19 10:28:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:19,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073209715] [2022-07-19 10:28:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:19,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:19,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583050133] [2022-07-19 10:28:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:19,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:19,056 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) [2022-07-19 10:28:19,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:28:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:28:19,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 10:28:19,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:19,206 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 [2022-07-19 10:28:19,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:19,260 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 [2022-07-19 10:28:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:28:19,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:19,483 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 [2022-07-19 10:28:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 10:28:19,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073209715] [2022-07-19 10:28:19,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583050133] [2022-07-19 10:28:19,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583050133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:28:19,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:28:19,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-19 10:28:19,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007314295] [2022-07-19 10:28:19,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:28:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 10:28:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 10:28:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:28:19,502 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:19,745 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2022-07-19 10:28:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 10:28:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 10:28:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:19,746 INFO L225 Difference]: With dead ends: 91 [2022-07-19 10:28:19,746 INFO L226 Difference]: Without dead ends: 79 [2022-07-19 10:28:19,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:28:19,747 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:19,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 99 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 129 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-07-19 10:28:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-19 10:28:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2022-07-19 10:28:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-19 10:28:19,754 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 32 [2022-07-19 10:28:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:19,754 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-19 10:28:19,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-19 10:28:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 10:28:19,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:19,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:19,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:28:19,967 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 [2022-07-19 10:28:19,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2022-07-19 10:28:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934042863] [2022-07-19 10:28:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:19,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:20,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:20,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168581169] [2022-07-19 10:28:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:20,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:20,029 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) [2022-07-19 10:28:20,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:28:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:28:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 10:28:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:20,151 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 44 treesize of output 42 [2022-07-19 10:28:20,206 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 [2022-07-19 10:28:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:20,252 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 [2022-07-19 10:28:20,305 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 [2022-07-19 10:28:20,357 INFO L356 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-07-19 10:28:20,357 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 [2022-07-19 10:28:20,475 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 10:28:20,477 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 1 case distinctions, treesize of input 56 treesize of output 26 [2022-07-19 10:28:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:28:20,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:21,514 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~c~0#1.offset| Int)) (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |ULTIMATE.start_main_~c~0#1.offset| 0))) (store .cse0 (+ |ULTIMATE.start_main_~c~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) (let ((.cse1 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| .cse0) |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 (+ |ULTIMATE.start_main_~c~0#1.offset| .cse1)))))) (+ |ULTIMATE.start_main_~c~0#1.offset| 8)) 1)) is different from false [2022-07-19 10:28:33,812 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 2147483647))) (and (or (not .cse0) (forall ((v_ArrVal_177 Int) (|ULTIMATE.start_main_~c~0#1.offset| Int)) (= (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_177)))) (store .cse1 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~c~0#1.base|) |ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) (or .cse0 (forall ((v_ArrVal_177 Int) (|ULTIMATE.start_main_~c~0#1.offset| Int)) (= (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_177)))) (store .cse2 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~c~0#1.base|) |ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))))) is different from false [2022-07-19 10:28:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 4 not checked. [2022-07-19 10:28:34,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934042863] [2022-07-19 10:28:34,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168581169] [2022-07-19 10:28:34,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168581169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:28:34,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:28:34,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-07-19 10:28:34,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278128662] [2022-07-19 10:28:34,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:28:34,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:28:34,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:28:34,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=368, Unknown=10, NotChecked=82, Total=552 [2022-07-19 10:28:34,557 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) [2022-07-19 10:28:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:35,338 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2022-07-19 10:28:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 10:28:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) Word has length 36 [2022-07-19 10:28:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:35,340 INFO L225 Difference]: With dead ends: 150 [2022-07-19 10:28:35,340 INFO L226 Difference]: Without dead ends: 116 [2022-07-19 10:28:35,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=164, Invalid=646, Unknown=10, NotChecked=110, Total=930 [2022-07-19 10:28:35,341 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:35,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 179 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 292 Invalid, 0 Unknown, 241 Unchecked, 0.5s Time] [2022-07-19 10:28:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-19 10:28:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2022-07-19 10:28:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-07-19 10:28:35,354 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 36 [2022-07-19 10:28:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:35,356 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-07-19 10:28:35,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) [2022-07-19 10:28:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-07-19 10:28:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:28:35,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:35,357 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:35,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:28:35,558 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 [2022-07-19 10:28:35,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:35,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2062198762, now seen corresponding path program 2 times [2022-07-19 10:28:35,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:35,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677684589] [2022-07-19 10:28:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:35,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:35,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:35,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660666314] [2022-07-19 10:28:35,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:28:35,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:35,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:35,602 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) [2022-07-19 10:28:35,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:28:35,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:28:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:28:35,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:28:35,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 10:28:35,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 10:28:35,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677684589] [2022-07-19 10:28:35,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660666314] [2022-07-19 10:28:35,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660666314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:28:35,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:28:35,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-19 10:28:35,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847840776] [2022-07-19 10:28:35,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:28:35,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:28:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:28:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:28:35,781 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:35,946 INFO L93 Difference]: Finished difference Result 178 states and 211 transitions. [2022-07-19 10:28:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:28:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 10:28:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:35,947 INFO L225 Difference]: With dead ends: 178 [2022-07-19 10:28:35,948 INFO L226 Difference]: Without dead ends: 98 [2022-07-19 10:28:35,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:28:35,948 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 115 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:35,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 64 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:28:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-19 10:28:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-07-19 10:28:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-07-19 10:28:35,958 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 38 [2022-07-19 10:28:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:35,958 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-07-19 10:28:35,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-07-19 10:28:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:28:35,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:35,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:35,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:28:36,175 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 [2022-07-19 10:28:36,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:36,176 INFO L85 PathProgramCache]: Analyzing trace with hash 658217347, now seen corresponding path program 2 times [2022-07-19 10:28:36,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:36,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008866636] [2022-07-19 10:28:36,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:36,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:36,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:36,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413103812] [2022-07-19 10:28:36,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:28:36,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:36,229 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) [2022-07-19 10:28:36,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:28:36,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:28:36,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:28:36,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:28:36,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 10:28:36,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 10:28:36,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:36,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008866636] [2022-07-19 10:28:36,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:36,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413103812] [2022-07-19 10:28:36,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413103812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:28:36,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:28:36,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-19 10:28:36,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003325742] [2022-07-19 10:28:36,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:28:36,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:28:36,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:36,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:28:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:28:36,418 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-07-19 10:28:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:36,601 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-07-19 10:28:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:28:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 42 [2022-07-19 10:28:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:36,601 INFO L225 Difference]: With dead ends: 133 [2022-07-19 10:28:36,602 INFO L226 Difference]: Without dead ends: 70 [2022-07-19 10:28:36,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-19 10:28:36,602 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:36,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 61 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:28:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-19 10:28:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2022-07-19 10:28:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-07-19 10:28:36,616 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 42 [2022-07-19 10:28:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:36,617 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-07-19 10:28:36,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-07-19 10:28:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-07-19 10:28:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 10:28:36,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:36,618 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:36,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:28:36,833 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 [2022-07-19 10:28:36,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:36,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1356840755, now seen corresponding path program 3 times [2022-07-19 10:28:36,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:36,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788740786] [2022-07-19 10:28:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:36,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:36,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:36,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761705957] [2022-07-19 10:28:36,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:28:36,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:36,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:36,907 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) [2022-07-19 10:28:36,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:28:37,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 10:28:37,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:28:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:28:37,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:28:37,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:28:37,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788740786] [2022-07-19 10:28:37,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761705957] [2022-07-19 10:28:37,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761705957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:28:37,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:28:37,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-19 10:28:37,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203986963] [2022-07-19 10:28:37,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:28:37,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 10:28:37,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:37,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 10:28:37,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:28:37,600 INFO L87 Difference]: Start difference. First operand 50 states and 54 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) [2022-07-19 10:28:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:37,839 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2022-07-19 10:28:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:28:37,840 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 44 [2022-07-19 10:28:37,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:37,842 INFO L225 Difference]: With dead ends: 152 [2022-07-19 10:28:37,842 INFO L226 Difference]: Without dead ends: 122 [2022-07-19 10:28:37,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:28:37,844 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 181 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:37,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 80 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:28:37,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-19 10:28:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2022-07-19 10:28:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:37,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-07-19 10:28:37,863 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 44 [2022-07-19 10:28:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:37,863 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-07-19 10:28:37,864 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) [2022-07-19 10:28:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-07-19 10:28:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:28:37,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:37,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:37,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:28:38,073 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 [2022-07-19 10:28:38,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:38,074 INFO L85 PathProgramCache]: Analyzing trace with hash 686844275, now seen corresponding path program 3 times [2022-07-19 10:28:38,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:38,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743477264] [2022-07-19 10:28:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:38,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:38,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049245490] [2022-07-19 10:28:38,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:28:38,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:38,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:38,092 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) [2022-07-19 10:28:38,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:28:38,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 10:28:38,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:28:38,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-19 10:28:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:38,582 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 44 treesize of output 42 [2022-07-19 10:28:38,689 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 [2022-07-19 10:28:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:38,759 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 [2022-07-19 10:28:38,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:38,835 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 [2022-07-19 10:28:38,935 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 [2022-07-19 10:28:39,023 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:28:39,024 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 [2022-07-19 10:28:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:28:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,035 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 [2022-07-19 10:28:39,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,097 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 116 treesize of output 57 [2022-07-19 10:28:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:39,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:28:39,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:28:39,255 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-19 10:28:39,255 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 [2022-07-19 10:28:39,427 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:28:39,428 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 [2022-07-19 10:28:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:28:39,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:28:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743477264] [2022-07-19 10:28:40,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049245490] [2022-07-19 10:28:40,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049245490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:28:40,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:28:40,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2022-07-19 10:28:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406364526] [2022-07-19 10:28:40,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:28:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 10:28:40,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 10:28:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1366, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 10:28:40,998 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:43,125 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2022-07-19 10:28:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 10:28:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-19 10:28:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:43,126 INFO L225 Difference]: With dead ends: 131 [2022-07-19 10:28:43,126 INFO L226 Difference]: Without dead ends: 129 [2022-07-19 10:28:43,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=664, Invalid=2876, Unknown=0, NotChecked=0, Total=3540 [2022-07-19 10:28:43,128 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:43,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 144 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 284 Invalid, 0 Unknown, 441 Unchecked, 0.3s Time] [2022-07-19 10:28:43,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-19 10:28:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2022-07-19 10:28:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 109 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2022-07-19 10:28:43,137 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 45 [2022-07-19 10:28:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:43,137 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2022-07-19 10:28:43,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:28:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2022-07-19 10:28:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 10:28:43,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:43,139 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:43,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 10:28:43,345 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 [2022-07-19 10:28:43,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash 132233513, now seen corresponding path program 4 times [2022-07-19 10:28:43,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:43,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517918712] [2022-07-19 10:28:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:43,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:43,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658688268] [2022-07-19 10:28:43,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:28:43,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:43,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:43,373 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) [2022-07-19 10:28:43,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:28:43,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:28:43,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:28:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-19 10:28:43,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:43,736 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:28:43,736 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 117 treesize of output 111 [2022-07-19 10:28:43,770 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 [2022-07-19 10:28:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:43,845 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 [2022-07-19 10:28:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:43,890 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 [2022-07-19 10:28:43,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-19 10:28:44,026 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:28:44,026 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 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-19 10:28:44,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:28:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,035 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 [2022-07-19 10:28:44,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,071 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 170 treesize of output 98 [2022-07-19 10:28:44,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,212 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:28:44,212 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 2 case distinctions, treesize of input 47 treesize of output 44 [2022-07-19 10:28:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,309 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-07-19 10:28:44,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 48 [2022-07-19 10:28:44,384 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:28:44,385 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 [2022-07-19 10:28:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:28:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,394 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 [2022-07-19 10:28:44,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:44,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:28:44,534 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 10:28:44,534 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 [2022-07-19 10:28:44,766 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-19 10:28:44,767 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 72 treesize of output 40 [2022-07-19 10:28:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:28:44,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:29:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:29:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:29:09,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517918712] [2022-07-19 10:29:09,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:29:09,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658688268] [2022-07-19 10:29:09,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658688268] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:29:09,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:29:09,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2022-07-19 10:29:09,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333679169] [2022-07-19 10:29:09,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:29:09,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 10:29:09,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:29:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 10:29:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 10:29:09,342 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:29:41,730 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2022-07-19 10:29:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-19 10:29:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 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 49 [2022-07-19 10:29:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:29:41,731 INFO L225 Difference]: With dead ends: 173 [2022-07-19 10:29:41,731 INFO L226 Difference]: Without dead ends: 117 [2022-07-19 10:29:41,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=299, Invalid=2563, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 10:29:41,733 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:29:41,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 163 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 318 Invalid, 0 Unknown, 355 Unchecked, 0.7s Time] [2022-07-19 10:29:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-19 10:29:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-07-19 10:29:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1043478260869566) internal successors, (127), 115 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2022-07-19 10:29:41,743 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 49 [2022-07-19 10:29:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:29:41,743 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2022-07-19 10:29:41,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2022-07-19 10:29:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:29:41,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:29:41,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:29:41,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:29:41,962 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 [2022-07-19 10:29:41,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:29:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:29:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1152617206, now seen corresponding path program 4 times [2022-07-19 10:29:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:29:41,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564270742] [2022-07-19 10:29:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:29:41,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:29:42,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:29:42,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930608623] [2022-07-19 10:29:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:29:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:29:42,028 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) [2022-07-19 10:29:42,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:29:42,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:29:42,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:29:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-19 10:29:42,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:29:42,791 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 44 treesize of output 42 [2022-07-19 10:29:42,896 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 [2022-07-19 10:29:42,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:42,945 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 [2022-07-19 10:29:42,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:42,983 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 [2022-07-19 10:29:43,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,023 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 [2022-07-19 10:29:43,074 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 [2022-07-19 10:29:43,137 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:29:43,137 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 [2022-07-19 10:29:43,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:29:43,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,149 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 [2022-07-19 10:29:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:29:43,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:29:43,260 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-19 10:29:43,260 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 65 treesize of output 73 [2022-07-19 10:29:43,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:43,307 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:29:43,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 42 [2022-07-19 10:29:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:29:43,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:29:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 10:29:44,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:29:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564270742] [2022-07-19 10:29:44,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:29:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930608623] [2022-07-19 10:29:44,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930608623] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:29:44,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:29:44,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2022-07-19 10:29:44,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110996113] [2022-07-19 10:29:44,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:29:44,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 10:29:44,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:29:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 10:29:44,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-07-19 10:29:44,301 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:29:44,920 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2022-07-19 10:29:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 10:29:44,920 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-19 10:29:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:29:44,921 INFO L225 Difference]: With dead ends: 148 [2022-07-19 10:29:44,921 INFO L226 Difference]: Without dead ends: 146 [2022-07-19 10:29:44,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2022-07-19 10:29:44,922 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:29:44,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 95 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 221 Invalid, 0 Unknown, 265 Unchecked, 0.2s Time] [2022-07-19 10:29:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-19 10:29:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2022-07-19 10:29:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.1159420289855073) internal successors, (154), 138 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2022-07-19 10:29:44,931 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 50 [2022-07-19 10:29:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:29:44,932 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2022-07-19 10:29:44,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2022-07-19 10:29:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:29:44,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:29:44,933 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:29:44,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:29:45,135 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 [2022-07-19 10:29:45,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:29:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:29:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1349508800, now seen corresponding path program 5 times [2022-07-19 10:29:45,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:29:45,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956358629] [2022-07-19 10:29:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:29:45,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:29:45,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:29:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887252960] [2022-07-19 10:29:45,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:29:45,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:29:45,193 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) [2022-07-19 10:29:45,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:29:48,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 10:29:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:29:49,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 10:29:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:29:49,017 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 44 treesize of output 42 [2022-07-19 10:29:49,113 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 [2022-07-19 10:29:49,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,177 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 [2022-07-19 10:29:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,227 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 [2022-07-19 10:29:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,261 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 [2022-07-19 10:29:49,296 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 [2022-07-19 10:29:49,382 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:29:49,382 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 [2022-07-19 10:29:49,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:29:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,391 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 [2022-07-19 10:29:49,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,507 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:29:49,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 48 [2022-07-19 10:29:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:49,562 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:29:49,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2022-07-19 10:29:49,653 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:29:49,654 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 [2022-07-19 10:29:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:29:49,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:29:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 10:29:52,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:29:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956358629] [2022-07-19 10:29:52,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:29:52,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887252960] [2022-07-19 10:29:52,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887252960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:29:52,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:29:52,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2022-07-19 10:29:52,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468060284] [2022-07-19 10:29:52,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:29:52,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 10:29:52,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:29:52,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 10:29:52,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 10:29:52,526 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:29:53,432 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2022-07-19 10:29:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 10:29:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-19 10:29:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:29:53,433 INFO L225 Difference]: With dead ends: 185 [2022-07-19 10:29:53,433 INFO L226 Difference]: Without dead ends: 183 [2022-07-19 10:29:53,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 10:29:53,434 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:29:53,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 127 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 257 Unchecked, 0.1s Time] [2022-07-19 10:29:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-19 10:29:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 150. [2022-07-19 10:29:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2022-07-19 10:29:53,445 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 54 [2022-07-19 10:29:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:29:53,446 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2022-07-19 10:29:53,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2022-07-19 10:29:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 10:29:53,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:29:53,447 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:29:53,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:29:53,654 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 [2022-07-19 10:29:53,655 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:29:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:29:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash -615668980, now seen corresponding path program 6 times [2022-07-19 10:29:53,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:29:53,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083379500] [2022-07-19 10:29:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:29:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:29:53,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:29:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994664846] [2022-07-19 10:29:53,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:29:53,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:53,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:29:53,678 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) [2022-07-19 10:29:53,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:29:54,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 10:29:54,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:29:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:29:54,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:29:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 10:29:54,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:29:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 10:29:55,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:29:55,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083379500] [2022-07-19 10:29:55,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:29:55,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994664846] [2022-07-19 10:29:55,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994664846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:29:55,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:29:55,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-19 10:29:55,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253017182] [2022-07-19 10:29:55,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:29:55,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 10:29:55,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:29:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 10:29:55,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:29:55,032 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:29:55,340 INFO L93 Difference]: Finished difference Result 180 states and 196 transitions. [2022-07-19 10:29:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:29:55,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-19 10:29:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:29:55,343 INFO L225 Difference]: With dead ends: 180 [2022-07-19 10:29:55,343 INFO L226 Difference]: Without dead ends: 149 [2022-07-19 10:29:55,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:29:55,344 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 187 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:29:55,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 78 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:29:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-19 10:29:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 104. [2022-07-19 10:29:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-07-19 10:29:55,353 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 55 [2022-07-19 10:29:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:29:55,354 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-07-19 10:29:55,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-07-19 10:29:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 10:29:55,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:29:55,354 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:29:55,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 10:29:55,560 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 [2022-07-19 10:29:55,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:29:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:29:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash 631323149, now seen corresponding path program 5 times [2022-07-19 10:29:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:29:55,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383113459] [2022-07-19 10:29:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:29:55,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:29:55,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:29:55,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333095757] [2022-07-19 10:29:55,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:29:55,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:55,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:29:55,616 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) [2022-07-19 10:29:55,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 10:30:17,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 10:30:17,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:30:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 10:30:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:30:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 10:30:18,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:30:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 10:30:18,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:30:18,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383113459] [2022-07-19 10:30:18,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:30:18,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333095757] [2022-07-19 10:30:18,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333095757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:30:18,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:30:18,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-07-19 10:30:18,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182178923] [2022-07-19 10:30:18,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:30:18,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 10:30:18,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:30:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 10:30:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-19 10:30:18,232 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2022-07-19 10:30:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:30:18,546 INFO L93 Difference]: Finished difference Result 235 states and 253 transitions. [2022-07-19 10:30:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:30:18,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 56 [2022-07-19 10:30:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:30:18,548 INFO L225 Difference]: With dead ends: 235 [2022-07-19 10:30:18,548 INFO L226 Difference]: Without dead ends: 174 [2022-07-19 10:30:18,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:30:18,548 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 239 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:30:18,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 112 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:30:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-19 10:30:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 132. [2022-07-19 10:30:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0916030534351144) internal successors, (143), 131 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:30:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2022-07-19 10:30:18,561 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 56 [2022-07-19 10:30:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:30:18,561 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2022-07-19 10:30:18,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2022-07-19 10:30:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2022-07-19 10:30:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 10:30:18,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:30:18,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:30:18,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 10:30:18,772 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 [2022-07-19 10:30:18,773 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:30:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:30:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1159119478, now seen corresponding path program 7 times [2022-07-19 10:30:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:30:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510443275] [2022-07-19 10:30:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:30:18,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:30:18,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:30:18,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606630579] [2022-07-19 10:30:18,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:30:18,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:30:18,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:30:18,800 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) [2022-07-19 10:30:18,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 10:30:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:30:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-19 10:30:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:30:19,516 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:30:19,516 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 54 treesize of output 50 [2022-07-19 10:30:19,555 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 [2022-07-19 10:30:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,623 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 [2022-07-19 10:30:19,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,680 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 [2022-07-19 10:30:19,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,722 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 [2022-07-19 10:30:19,780 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 19 treesize of output 18 [2022-07-19 10:30:19,854 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:30:19,854 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 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-19 10:30:19,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:30:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,862 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 [2022-07-19 10:30:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,901 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 115 treesize of output 47 [2022-07-19 10:30:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:19,991 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:30:19,992 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 2 case distinctions, treesize of input 47 treesize of output 48 [2022-07-19 10:30:20,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,067 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:30:20,067 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 2 case distinctions, treesize of input 43 treesize of output 44 [2022-07-19 10:30:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,178 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-07-19 10:30:20,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 48 [2022-07-19 10:30:20,293 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:30:20,294 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 153 treesize of output 139 [2022-07-19 10:30:20,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:30:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,303 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 [2022-07-19 10:30:20,433 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:30:20,433 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 181 treesize of output 163 [2022-07-19 10:30:20,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 233 [2022-07-19 10:30:20,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:30:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:30:20,598 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 10:30:20,598 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 69 treesize of output 68 [2022-07-19 10:30:20,844 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-19 10:30:20,845 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 76 treesize of output 40 [2022-07-19 10:30:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:30:20,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:30:47,412 WARN L233 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 124 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)