./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/eqn4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:27:45,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:27:45,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:27:45,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:27:45,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:27:45,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:27:45,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:27:45,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:27:45,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:27:45,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:27:45,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:27:45,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:27:45,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:27:45,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:27:45,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:27:45,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:27:45,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:27:45,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:27:45,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:27:45,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:27:45,575 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:27:45,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:27:45,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:27:45,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:27:45,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:27:45,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:27:45,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:27:45,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:27:45,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:27:45,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:27:45,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:27:45,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:27:45,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:27:45,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:27:45,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:27:45,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:27:45,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:27:45,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:27:45,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:27:45,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:27:45,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:27:45,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:27:45,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:27:45,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:27:45,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:27:45,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:27:45,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:27:45,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:27:45,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:27:45,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:27:45,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:27:45,615 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:27:45,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:27:45,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:27:45,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:27:45,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:27:45,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:27:45,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:27:45,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:27:45,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:27:45,617 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:27:45,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:27:45,618 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:27:45,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:27:45,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:27:45,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:27:45,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:27:45,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:27:45,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:27:45,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:27:45,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:27:45,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:27:45,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:27:45,620 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:27:45,620 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:27:45,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:27:45,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a [2022-07-19 10:27:45,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:27:45,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:27:45,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:27:45,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:27:45,835 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:27:45,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4.c [2022-07-19 10:27:45,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d37fc3bb2/76f87af3e519418fb6f7987b974c1d7a/FLAG916be9a67 [2022-07-19 10:27:46,260 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:27:46,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c [2022-07-19 10:27:46,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d37fc3bb2/76f87af3e519418fb6f7987b974c1d7a/FLAG916be9a67 [2022-07-19 10:27:46,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d37fc3bb2/76f87af3e519418fb6f7987b974c1d7a [2022-07-19 10:27:46,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:27:46,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:27:46,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:27:46,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:27:46,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:27:46,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42fcded3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46, skipping insertion in model container [2022-07-19 10:27:46,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:27:46,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:27:46,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c[587,600] [2022-07-19 10:27:46,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:27:46,471 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:27:46,484 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c[587,600] [2022-07-19 10:27:46,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:27:46,506 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:27:46,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46 WrapperNode [2022-07-19 10:27:46,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:27:46,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:27:46,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:27:46,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:27:46,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,556 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-07-19 10:27:46,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:27:46,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:27:46,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:27:46,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:27:46,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:27:46,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:27:46,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:27:46,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:27:46,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (1/1) ... [2022-07-19 10:27:46,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:27:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:46,633 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 10:27:46,636 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 10:27:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:27:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:27:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:27:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:27:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:27:46,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:27:46,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:27:46,712 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:27:46,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:27:46,818 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:27:46,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:27:46,822 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 10:27:46,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:27:46 BoogieIcfgContainer [2022-07-19 10:27:46,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:27:46,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:27:46,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:27:46,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:27:46,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:27:46" (1/3) ... [2022-07-19 10:27:46,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55140cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:27:46, skipping insertion in model container [2022-07-19 10:27:46,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:27:46" (2/3) ... [2022-07-19 10:27:46,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55140cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:27:46, skipping insertion in model container [2022-07-19 10:27:46,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:27:46" (3/3) ... [2022-07-19 10:27:46,830 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn4.c [2022-07-19 10:27:46,840 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:27:46,840 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:27:46,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:27:46,883 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@13846193, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c20db92 [2022-07-19 10:27:46,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:27:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 10:27:46,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:46,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:46,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:46,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-07-19 10:27:46,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:46,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084546937] [2022-07-19 10:27:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:46,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:27:47,037 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 10:27:47,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:47,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084546937] [2022-07-19 10:27:47,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084546937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:27:47,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:27:47,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:27:47,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398855436] [2022-07-19 10:27:47,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:27:47,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:27:47,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:27:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:27:47,071 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:47,085 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-19 10:27:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:27:47,087 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 10:27:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:47,093 INFO L225 Difference]: With dead ends: 38 [2022-07-19 10:27:47,093 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 10:27:47,095 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 10:27:47,099 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:47,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:27:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 10:27:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-19 10:27:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-19 10:27:47,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-07-19 10:27:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:47,125 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-19 10:27:47,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:47,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-19 10:27:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 10:27:47,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:47,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:47,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:27:47,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-07-19 10:27:47,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:47,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929309857] [2022-07-19 10:27:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:47,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:47,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:47,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746188372] [2022-07-19 10:27:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:47,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:47,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:47,157 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 10:27:47,158 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 10:27:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:27:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 10:27:47,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:47,346 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-19 10:27:47,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-07-19 10:27:47,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:47,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:47,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2022-07-19 10:27:47,442 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 5 treesize of output 3 [2022-07-19 10:27:47,487 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 10:27:47,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:27:47,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:47,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929309857] [2022-07-19 10:27:47,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746188372] [2022-07-19 10:27:47,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746188372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:27:47,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:27:47,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:27:47,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715983412] [2022-07-19 10:27:47,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:27:47,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:27:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:47,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:27:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:27:47,491 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:47,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:47,581 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-19 10:27:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:27:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 10:27:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:47,583 INFO L225 Difference]: With dead ends: 34 [2022-07-19 10:27:47,583 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 10:27:47,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:27:47,584 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:47,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:27:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 10:27:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-19 10:27:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-19 10:27:47,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-19 10:27:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:47,589 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-19 10:27:47,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-19 10:27:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:27:47,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:47,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:47,610 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 10:27:47,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:47,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2022-07-19 10:27:47,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:47,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119567915] [2022-07-19 10:27:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:47,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:47,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:47,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491829138] [2022-07-19 10:27:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:47,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:47,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:47,856 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 10:27:47,859 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 10:27:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:27:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:27:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:47,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:27:47,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119567915] [2022-07-19 10:27:47,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491829138] [2022-07-19 10:27:47,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491829138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:27:47,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:27:47,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:27:47,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535388033] [2022-07-19 10:27:47,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:27:47,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:27:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:27:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:27:47,941 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:47,993 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-19 10:27:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:27:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:27:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:47,995 INFO L225 Difference]: With dead ends: 49 [2022-07-19 10:27:47,995 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 10:27:47,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:27:47,998 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:48,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:27:48,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 10:27:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-07-19 10:27:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-19 10:27:48,020 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-07-19 10:27:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:48,020 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-19 10:27:48,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:48,022 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-19 10:27:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:27:48,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:48,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:48,039 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 10:27:48,239 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,SelfDestructingSolverStorable2 [2022-07-19 10:27:48,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-07-19 10:27:48,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:48,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670373792] [2022-07-19 10:27:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:48,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:48,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:48,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949266184] [2022-07-19 10:27:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:48,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:48,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:48,273 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 10:27:48,274 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 10:27:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:27:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:27:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:48,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:48,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:48,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670373792] [2022-07-19 10:27:48,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:48,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949266184] [2022-07-19 10:27:48,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949266184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:48,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:48,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-19 10:27:48,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850760969] [2022-07-19 10:27:48,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:48,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:27:48,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:27:48,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:27:48,385 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:48,461 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-19 10:27:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:27:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:27:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:48,462 INFO L225 Difference]: With dead ends: 44 [2022-07-19 10:27:48,462 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:27:48,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:27:48,467 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:48,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:27:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:27:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-07-19 10:27:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-19 10:27:48,485 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-07-19 10:27:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:48,486 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-19 10:27:48,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:48,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-19 10:27:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:27:48,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:48,487 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:48,503 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 10:27:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:48,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2022-07-19 10:27:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999015481] [2022-07-19 10:27:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:48,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:48,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68301379] [2022-07-19 10:27:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:48,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:48,733 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 10:27:48,740 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 10:27:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:27:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 10:27:48,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:48,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:27:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:48,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999015481] [2022-07-19 10:27:48,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:48,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68301379] [2022-07-19 10:27:48,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68301379] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:27:48,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:27:48,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:27:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699021558] [2022-07-19 10:27:48,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:27:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:27:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:27:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:27:48,815 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:48,864 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-07-19 10:27:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:27:48,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 10:27:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:48,865 INFO L225 Difference]: With dead ends: 41 [2022-07-19 10:27:48,865 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 10:27:48,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:27:48,866 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:48,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:27:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 10:27:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-19 10:27:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-19 10:27:48,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2022-07-19 10:27:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:48,868 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-19 10:27:48,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-19 10:27:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:27:48,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:48,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:48,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 10:27:49,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:49,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:49,086 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-07-19 10:27:49,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:49,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882247396] [2022-07-19 10:27:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:49,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:49,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:49,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672691235] [2022-07-19 10:27:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:49,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:49,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:49,132 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 10:27:49,133 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 10:27:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:27:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 10:27:49,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:49,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:27:49,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:49,222 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 14 treesize of output 14 [2022-07-19 10:27:49,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:49,245 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 14 treesize of output 16 [2022-07-19 10:27:49,297 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-19 10:27:49,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 10:27:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:49,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:49,479 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_147) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-07-19 10:27:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-19 10:27:49,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882247396] [2022-07-19 10:27:49,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672691235] [2022-07-19 10:27:49,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672691235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:49,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:49,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-19 10:27:49,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717825484] [2022-07-19 10:27:49,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:49,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:27:49,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:49,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:27:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2022-07-19 10:27:49,494 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:49,570 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-07-19 10:27:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:27:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 10:27:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:49,571 INFO L225 Difference]: With dead ends: 35 [2022-07-19 10:27:49,571 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 10:27:49,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=110, Unknown=1, NotChecked=22, Total=182 [2022-07-19 10:27:49,572 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:49,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 65 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-07-19 10:27:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 10:27:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2022-07-19 10:27:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-19 10:27:49,574 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2022-07-19 10:27:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:49,575 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-19 10:27:49,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-19 10:27:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:27:49,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:49,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:49,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 10:27:49,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:49,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2022-07-19 10:27:49,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:49,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249355511] [2022-07-19 10:27:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:49,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:49,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385894744] [2022-07-19 10:27:49,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:27:49,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:49,811 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 10:27:49,812 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 10:27:49,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:27:49,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:27:49,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:27:49,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:49,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:49,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:49,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249355511] [2022-07-19 10:27:49,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:49,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385894744] [2022-07-19 10:27:49,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385894744] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:49,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:49,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:27:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713363326] [2022-07-19 10:27:49,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:27:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:27:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:27:49,919 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:50,018 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-07-19 10:27:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:27:50,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-19 10:27:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:50,019 INFO L225 Difference]: With dead ends: 60 [2022-07-19 10:27:50,019 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 10:27:50,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:27:50,020 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:50,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 37 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:27:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 10:27:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-07-19 10:27:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-19 10:27:50,024 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-07-19 10:27:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:50,024 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-19 10:27:50,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-19 10:27:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:27:50,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:50,025 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:50,052 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 10:27:50,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:50,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-07-19 10:27:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011280831] [2022-07-19 10:27:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:50,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:50,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786022858] [2022-07-19 10:27:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:50,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:50,262 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 10:27:50,263 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 10:27:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:27:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 10:27:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:50,361 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-19 10:27:50,362 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-07-19 10:27:50,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-07-19 10:27:50,392 INFO L356 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-07-19 10:27:50,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2022-07-19 10:27:50,414 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 16 treesize of output 5 [2022-07-19 10:27:50,418 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 5 treesize of output 3 [2022-07-19 10:27:50,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:50,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2022-07-19 10:27:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:50,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-07-19 10:27:50,501 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 5 treesize of output 3 [2022-07-19 10:27:50,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:27:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:50,570 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:27:50,570 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 28 treesize of output 30 [2022-07-19 10:27:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:50,629 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:27:50,629 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 10:27:50,735 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:27:50,735 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 10:27:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:50,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:51,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:51,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011280831] [2022-07-19 10:27:51,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:51,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786022858] [2022-07-19 10:27:51,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786022858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:51,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:51,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-07-19 10:27:51,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664355909] [2022-07-19 10:27:51,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:51,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:27:51,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:27:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:27:51,067 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:51,150 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-07-19 10:27:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:27:51,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:27:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:51,150 INFO L225 Difference]: With dead ends: 39 [2022-07-19 10:27:51,151 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:27:51,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:27:51,151 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:51,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-07-19 10:27:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:27:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-19 10:27:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-19 10:27:51,155 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2022-07-19 10:27:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:51,155 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-19 10:27:51,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-19 10:27:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:27:51,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:51,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:51,176 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 10:27:51,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:51,357 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2022-07-19 10:27:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:51,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216052549] [2022-07-19 10:27:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:51,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:51,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:51,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38887814] [2022-07-19 10:27:51,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:27:51,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:51,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:51,388 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 10:27:51,427 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 10:27:51,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:27:51,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:27:51,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 10:27:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:51,620 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-19 10:27:51,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-07-19 10:27:51,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:51,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:51,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-07-19 10:27:51,663 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 5 treesize of output 3 [2022-07-19 10:27:51,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:27:51,704 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 14 treesize of output 16 [2022-07-19 10:27:51,718 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 14 treesize of output 16 [2022-07-19 10:27:51,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:51,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:27:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:51,771 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 10:27:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:51,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:51,959 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_269 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_269) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-07-19 10:27:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-07-19 10:27:51,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:51,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216052549] [2022-07-19 10:27:51,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:51,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38887814] [2022-07-19 10:27:51,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38887814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:51,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:51,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-19 10:27:51,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024862688] [2022-07-19 10:27:51,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:51,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 10:27:51,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 10:27:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=129, Unknown=1, NotChecked=24, Total=210 [2022-07-19 10:27:51,970 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:52,193 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-07-19 10:27:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 10:27:52,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:27:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:52,194 INFO L225 Difference]: With dead ends: 98 [2022-07-19 10:27:52,194 INFO L226 Difference]: Without dead ends: 96 [2022-07-19 10:27:52,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=443, Unknown=1, NotChecked=46, Total=650 [2022-07-19 10:27:52,195 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:52,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 124 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 109 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-07-19 10:27:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-19 10:27:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 39. [2022-07-19 10:27:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-07-19 10:27:52,199 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 20 [2022-07-19 10:27:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:52,199 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-07-19 10:27:52,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-07-19 10:27:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:27:52,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:52,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:52,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:27:52,400 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,SelfDestructingSolverStorable8 [2022-07-19 10:27:52,401 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash 986773582, now seen corresponding path program 2 times [2022-07-19 10:27:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:52,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386862697] [2022-07-19 10:27:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:52,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:52,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:52,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606453343] [2022-07-19 10:27:52,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:27:52,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:52,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:52,455 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 10:27:52,492 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 10:27:52,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:27:52,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:27:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:27:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:27:52,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:27:52,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:52,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386862697] [2022-07-19 10:27:52,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:52,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606453343] [2022-07-19 10:27:52,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606453343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:52,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:52,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:27:52,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005699518] [2022-07-19 10:27:52,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:52,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:27:52,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:52,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:27:52,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:27:52,581 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 10:27:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:52,744 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-07-19 10:27:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:27:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 10:27:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:52,745 INFO L225 Difference]: With dead ends: 68 [2022-07-19 10:27:52,745 INFO L226 Difference]: Without dead ends: 59 [2022-07-19 10:27:52,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:27:52,746 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:52,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 63 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:27:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-19 10:27:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2022-07-19 10:27:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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 10:27:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-07-19 10:27:52,750 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2022-07-19 10:27:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:52,750 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-07-19 10:27:52,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 10:27:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-07-19 10:27:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:27:52,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:52,751 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:52,785 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 10:27:52,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 10:27:52,969 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:52,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:52,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 3 times [2022-07-19 10:27:52,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:52,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836433310] [2022-07-19 10:27:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:52,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:52,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:52,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188497163] [2022-07-19 10:27:52,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:27:52,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:52,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:52,984 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 10:27:52,987 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 10:27:53,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:27:53,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:27:53,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 10:27:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:27:53,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:27:53,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:53,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836433310] [2022-07-19 10:27:53,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:53,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188497163] [2022-07-19 10:27:53,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188497163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:53,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:53,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-19 10:27:53,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722192428] [2022-07-19 10:27:53,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:53,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:27:53,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:27:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:27:53,147 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:53,271 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-07-19 10:27:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:27:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:27:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:53,272 INFO L225 Difference]: With dead ends: 63 [2022-07-19 10:27:53,272 INFO L226 Difference]: Without dead ends: 43 [2022-07-19 10:27:53,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:27:53,273 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:53,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 58 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:27:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-19 10:27:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-07-19 10:27:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-19 10:27:53,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 24 [2022-07-19 10:27:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:53,276 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-19 10:27:53,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-19 10:27:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:27:53,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:53,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:53,310 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 10:27:53,494 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,SelfDestructingSolverStorable10 [2022-07-19 10:27:53,495 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 4 times [2022-07-19 10:27:53,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:53,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468036369] [2022-07-19 10:27:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:53,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:53,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:53,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873486591] [2022-07-19 10:27:53,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:27:53,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:53,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:53,536 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 10:27:53,537 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 10:27:53,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:27:53,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:27:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 10:27:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:53,741 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-19 10:27:53,742 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-07-19 10:27:53,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-07-19 10:27:53,774 INFO L356 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-07-19 10:27:53,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2022-07-19 10:27:53,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:53,801 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 16 treesize of output 5 [2022-07-19 10:27:53,804 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 5 treesize of output 3 [2022-07-19 10:27:53,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2022-07-19 10:27:53,826 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-07-19 10:27:53,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2022-07-19 10:27:53,861 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 18 treesize of output 16 [2022-07-19 10:27:53,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:27:53,900 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-19 10:27:53,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-07-19 10:27:53,945 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-19 10:27:53,946 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 28 treesize of output 30 [2022-07-19 10:27:53,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 130 [2022-07-19 10:27:54,021 INFO L356 Elim1Store]: treesize reduction 356, result has 8.0 percent of original size [2022-07-19 10:27:54,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 123 treesize of output 173 [2022-07-19 10:27:54,111 INFO L356 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2022-07-19 10:27:54,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2022-07-19 10:27:54,214 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 10:27:54,214 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 62 treesize of output 28 [2022-07-19 10:27:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:54,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:56,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:56,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468036369] [2022-07-19 10:27:56,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:56,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873486591] [2022-07-19 10:27:56,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873486591] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:56,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:56,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2022-07-19 10:27:56,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450763337] [2022-07-19 10:27:56,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:56,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:27:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:27:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:27:56,301 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:56,534 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-07-19 10:27:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 10:27:56,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:27:56,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:56,535 INFO L225 Difference]: With dead ends: 63 [2022-07-19 10:27:56,535 INFO L226 Difference]: Without dead ends: 61 [2022-07-19 10:27:56,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:27:56,536 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:56,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-07-19 10:27:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-19 10:27:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-07-19 10:27:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-19 10:27:56,543 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 24 [2022-07-19 10:27:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:56,544 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-19 10:27:56,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-19 10:27:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:27:56,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:56,545 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:56,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 10:27:56,762 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,SelfDestructingSolverStorable11 [2022-07-19 10:27:56,762 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash -900609774, now seen corresponding path program 4 times [2022-07-19 10:27:56,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:56,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425197021] [2022-07-19 10:27:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:56,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:56,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034917098] [2022-07-19 10:27:56,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:27:56,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:56,804 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 10:27:56,844 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 10:27:56,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:27:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:27:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 10:27:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:56,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:56,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:56,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425197021] [2022-07-19 10:27:56,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:56,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034917098] [2022-07-19 10:27:56,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034917098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:56,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:56,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-19 10:27:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059577529] [2022-07-19 10:27:56,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 10:27:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 10:27:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:27:56,996 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:57,239 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2022-07-19 10:27:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:27:57,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:27:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:57,240 INFO L225 Difference]: With dead ends: 133 [2022-07-19 10:27:57,240 INFO L226 Difference]: Without dead ends: 112 [2022-07-19 10:27:57,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2022-07-19 10:27:57,241 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 180 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:57,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 98 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:27:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-19 10:27:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2022-07-19 10:27:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-07-19 10:27:57,247 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 24 [2022-07-19 10:27:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:57,248 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-07-19 10:27:57,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-07-19 10:27:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:27:57,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:57,248 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:57,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 10:27:57,465 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,SelfDestructingSolverStorable12 [2022-07-19 10:27:57,465 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 5 times [2022-07-19 10:27:57,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:57,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616781248] [2022-07-19 10:27:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:57,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:57,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:57,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045404030] [2022-07-19 10:27:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:27:57,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:57,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:57,479 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 10:27:57,480 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 10:27:57,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 10:27:57,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:27:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 10:27:57,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:57,981 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-19 10:27:57,981 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-07-19 10:27:58,012 INFO L356 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-07-19 10:27:58,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2022-07-19 10:27:58,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:58,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:27:58,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 83 [2022-07-19 10:27:58,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:58,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-07-19 10:27:58,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 30 [2022-07-19 10:27:58,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:58,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-07-19 10:27:58,148 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 5 treesize of output 3 [2022-07-19 10:27:58,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:27:58,203 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:27:58,204 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 132 treesize of output 124 [2022-07-19 10:27:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,213 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 113 treesize of output 187 [2022-07-19 10:27:58,220 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-19 10:27:58,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,265 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 105 treesize of output 37 [2022-07-19 10:27:58,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,326 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:27:58,326 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 43 treesize of output 44 [2022-07-19 10:27:58,402 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:27:58,403 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 177 treesize of output 161 [2022-07-19 10:27:58,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,412 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 10:27:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,463 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 81 treesize of output 32 [2022-07-19 10:27:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:58,531 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 10:27:58,532 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 68 treesize of output 58 [2022-07-19 10:27:58,746 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-19 10:27:58,746 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 84 treesize of output 44 [2022-07-19 10:27:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:58,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:28:08,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:28:08,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616781248] [2022-07-19 10:28:08,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:28:08,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045404030] [2022-07-19 10:28:08,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045404030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:28:08,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:28:08,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-07-19 10:28:08,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990873795] [2022-07-19 10:28:08,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:28:08,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:28:08,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:28:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:28:08,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:28:08,496 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 10:28:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:28:09,873 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-07-19 10:28:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 10:28:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 10:28:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:28:09,874 INFO L225 Difference]: With dead ends: 82 [2022-07-19 10:28:09,874 INFO L226 Difference]: Without dead ends: 53 [2022-07-19 10:28:09,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-07-19 10:28:09,875 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:28:09,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 105 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 103 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-07-19 10:28:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-19 10:28:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-19 10:28:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 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 10:28:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-07-19 10:28:09,879 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 28 [2022-07-19 10:28:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:28:09,879 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-07-19 10:28:09,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 10:28:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-07-19 10:28:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:28:09,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:28:09,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:28:09,899 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 10:28:10,084 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,SelfDestructingSolverStorable13 [2022-07-19 10:28:10,085 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:28:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:28:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 6 times [2022-07-19 10:28:10,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:28:10,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547988991] [2022-07-19 10:28:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:28:10,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:28:10,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:28:10,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655522494] [2022-07-19 10:28:10,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:28:10,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:28:10,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:28:10,115 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 10:28:10,117 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 10:28:10,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 10:28:10,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:28:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 10:28:10,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:28:10,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:28:10,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,556 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-07-19 10:28:10,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-07-19 10:28:10,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:28:10,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:28:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,619 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:28:10,619 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 32 treesize of output 34 [2022-07-19 10:28:10,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,677 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:28:10,677 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 32 treesize of output 34 [2022-07-19 10:28:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,741 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:28:10,741 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 32 treesize of output 34 [2022-07-19 10:28:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,834 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:28:10,834 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 10:28:10,915 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 10:28:10,915 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 79 treesize of output 75 [2022-07-19 10:28:10,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,935 INFO L356 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2022-07-19 10:28:10,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 111 [2022-07-19 10:28:10,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:10,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 1 [2022-07-19 10:28:11,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 143 [2022-07-19 10:28:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:11,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:11,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:11,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:11,149 INFO L356 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2022-07-19 10:28:11,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 201 [2022-07-19 10:28:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:28:11,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 1 [2022-07-19 10:28:17,374 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:28:17,375 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 52 treesize of output 32 [2022-07-19 10:28:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:28:17,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:28:32,676 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:30:18,346 WARN L233 SmtUtils]: Spent 1.54m on a formula simplification. DAG size of input: 128 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:30:32,714 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:30:54,225 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:31:39,308 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:31:39,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:31:39,357 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-19 10:31:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:31:39,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:31:39,365 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 10:31:39,365 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 1 [2022-07-19 10:31:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:31:39,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:31:39,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547988991] [2022-07-19 10:31:39,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:31:39,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655522494] [2022-07-19 10:31:39,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655522494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:31:39,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:31:39,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2022-07-19 10:31:39,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970113405] [2022-07-19 10:31:39,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:31:39,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 10:31:39,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:31:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 10:31:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1012, Unknown=31, NotChecked=0, Total=1260 [2022-07-19 10:31:39,369 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 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 10:31:51,408 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 189 DAG size of output: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:32:05,872 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 117 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:32:26,208 WARN L233 SmtUtils]: Spent 8.47s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)