./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/nla-digbench-scaling/prod4br-ll_unwindbound20.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 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 01:15:37,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 01:15:37,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 01:15:37,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 01:15:37,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 01:15:37,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 01:15:37,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 01:15:37,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 01:15:37,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 01:15:37,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 01:15:37,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 01:15:37,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 01:15:37,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 01:15:37,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 01:15:37,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 01:15:37,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 01:15:37,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 01:15:37,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 01:15:37,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 01:15:37,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 01:15:37,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 01:15:37,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 01:15:37,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 01:15:37,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 01:15:37,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 01:15:37,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 01:15:37,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 01:15:37,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 01:15:37,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 01:15:37,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 01:15:37,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 01:15:37,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 01:15:37,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 01:15:37,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 01:15:37,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 01:15:37,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 01:15:37,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 01:15:37,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 01:15:37,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 01:15:37,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 01:15:37,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 01:15:37,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 01:15:37,947 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 01:15:37,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 01:15:37,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 01:15:37,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 01:15:37,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 01:15:37,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 01:15:37,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 01:15:37,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 01:15:37,948 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 01:15:37,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 01:15:37,951 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 01:15:37,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 01:15:37,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 01:15:37,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 01:15:37,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 01:15:37,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 01:15:37,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 01:15:37,952 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 01:15:37,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 01:15:37,952 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 01:15:37,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 01:15:37,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 01:15:37,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 01:15:37,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 01:15:37,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:15:37,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 01:15:37,953 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca [2023-02-14 01:15:38,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 01:15:38,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 01:15:38,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 01:15:38,183 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 01:15:38,183 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 01:15:38,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2023-02-14 01:15:39,158 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 01:15:39,271 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 01:15:39,271 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2023-02-14 01:15:39,277 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecaec89ff/2ae58a613cee47ed9efc245ca8367d1d/FLAGbb4348b8c [2023-02-14 01:15:39,287 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecaec89ff/2ae58a613cee47ed9efc245ca8367d1d [2023-02-14 01:15:39,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 01:15:39,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 01:15:39,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 01:15:39,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 01:15:39,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 01:15:39,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d85d7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39, skipping insertion in model container [2023-02-14 01:15:39,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 01:15:39,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 01:15:39,421 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2023-02-14 01:15:39,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:15:39,454 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 01:15:39,464 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2023-02-14 01:15:39,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:15:39,491 INFO L208 MainTranslator]: Completed translation [2023-02-14 01:15:39,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39 WrapperNode [2023-02-14 01:15:39,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 01:15:39,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 01:15:39,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 01:15:39,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 01:15:39,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,528 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-14 01:15:39,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 01:15:39,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 01:15:39,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 01:15:39,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 01:15:39,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,551 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 01:15:39,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 01:15:39,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 01:15:39,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 01:15:39,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (1/1) ... [2023-02-14 01:15:39,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:15:39,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:39,580 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) [2023-02-14 01:15:39,594 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 [2023-02-14 01:15:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 01:15:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 01:15:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 01:15:39,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 01:15:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 01:15:39,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 01:15:39,668 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 01:15:39,669 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 01:15:39,780 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 01:15:39,784 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 01:15:39,784 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 01:15:39,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:15:39 BoogieIcfgContainer [2023-02-14 01:15:39,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 01:15:39,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 01:15:39,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 01:15:39,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 01:15:39,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:15:39" (1/3) ... [2023-02-14 01:15:39,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c71d90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:15:39, skipping insertion in model container [2023-02-14 01:15:39,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:15:39" (2/3) ... [2023-02-14 01:15:39,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c71d90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:15:39, skipping insertion in model container [2023-02-14 01:15:39,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:15:39" (3/3) ... [2023-02-14 01:15:39,809 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.c [2023-02-14 01:15:39,854 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 01:15:39,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 01:15:39,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 01:15:39,891 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@146ecefd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 01:15:39,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 01:15:39,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 01:15:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 01:15:39,899 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:39,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:39,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2023-02-14 01:15:39,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:39,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134087067] [2023-02-14 01:15:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:39,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:40,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:40,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134087067] [2023-02-14 01:15:40,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 01:15:40,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833741890] [2023-02-14 01:15:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:40,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:40,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:40,007 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) [2023-02-14 01:15:40,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 01:15:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:40,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 01:15:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:40,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:15:40,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833741890] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:15:40,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:15:40,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 01:15:40,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588770915] [2023-02-14 01:15:40,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:15:40,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 01:15:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 01:15:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 01:15:40,116 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:15:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:40,128 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-02-14 01:15:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 01:15:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 01:15:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:40,134 INFO L225 Difference]: With dead ends: 43 [2023-02-14 01:15:40,134 INFO L226 Difference]: Without dead ends: 19 [2023-02-14 01:15:40,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 01:15:40,141 INFO L413 NwaCegarLoop]: 29 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, 29 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 [2023-02-14 01:15:40,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:15:40,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-14 01:15:40,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-14 01:15:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-14 01:15:40,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2023-02-14 01:15:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:40,179 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-14 01:15:40,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:15:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-14 01:15:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 01:15:40,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:40,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:40,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:40,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 01:15:40,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2023-02-14 01:15:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:40,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463950709] [2023-02-14 01:15:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:40,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:40,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:40,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463950709] [2023-02-14 01:15:40,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 01:15:40,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495841313] [2023-02-14 01:15:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:40,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:40,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:40,414 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) [2023-02-14 01:15:40,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 01:15:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:40,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 01:15:40,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:40,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:15:40,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495841313] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:15:40,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:15:40,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:15:40,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012495485] [2023-02-14 01:15:40,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:15:40,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:15:40,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:40,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:15:40,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:15:40,496 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:15:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:40,517 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-02-14 01:15:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:15:40,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-14 01:15:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:40,518 INFO L225 Difference]: With dead ends: 29 [2023-02-14 01:15:40,518 INFO L226 Difference]: Without dead ends: 21 [2023-02-14 01:15:40,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:15:40,519 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:40,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:15:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-14 01:15:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-14 01:15:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-02-14 01:15:40,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2023-02-14 01:15:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:40,527 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-02-14 01:15:40,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:15:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-02-14 01:15:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 01:15:40,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:40,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:40,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:40,729 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,SelfDestructingSolverStorable1 [2023-02-14 01:15:40,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:40,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2023-02-14 01:15:40,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:40,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458781060] [2023-02-14 01:15:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:40,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:40,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:40,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608539409] [2023-02-14 01:15:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:40,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:40,747 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) [2023-02-14 01:15:40,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 01:15:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 01:15:40,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:40,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:15:40,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:40,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458781060] [2023-02-14 01:15:40,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:15:40,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608539409] [2023-02-14 01:15:40,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608539409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:15:40,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:15:40,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 01:15:40,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547653536] [2023-02-14 01:15:40,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:15:40,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 01:15:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 01:15:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:15:40,888 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:15:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:41,012 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-02-14 01:15:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 01:15:41,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-14 01:15:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:41,015 INFO L225 Difference]: With dead ends: 34 [2023-02-14 01:15:41,015 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 01:15:41,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:15:41,019 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:41,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:15:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 01:15:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-02-14 01:15:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 01:15:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-14 01:15:41,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2023-02-14 01:15:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:41,028 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-14 01:15:41,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:15:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-14 01:15:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 01:15:41,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:41,029 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:41,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:41,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:41,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2023-02-14 01:15:41,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:41,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884433949] [2023-02-14 01:15:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:41,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:41,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347871001] [2023-02-14 01:15:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:41,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:41,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:41,254 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) [2023-02-14 01:15:41,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 01:15:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 01:15:41,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:41,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:15:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:41,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:41,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884433949] [2023-02-14 01:15:41,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:15:41,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347871001] [2023-02-14 01:15:41,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347871001] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:15:41,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:15:41,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-14 01:15:41,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158536253] [2023-02-14 01:15:41,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:15:41,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 01:15:41,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 01:15:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-14 01:15:41,646 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:41,894 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2023-02-14 01:15:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 01:15:41,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-14 01:15:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:41,896 INFO L225 Difference]: With dead ends: 47 [2023-02-14 01:15:41,896 INFO L226 Difference]: Without dead ends: 45 [2023-02-14 01:15:41,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-02-14 01:15:41,897 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:41,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 71 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:15:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-14 01:15:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2023-02-14 01:15:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 01:15:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-02-14 01:15:41,903 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2023-02-14 01:15:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:41,904 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-02-14 01:15:41,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-02-14 01:15:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 01:15:41,905 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:41,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:41,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:42,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:42,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2023-02-14 01:15:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:42,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800150232] [2023-02-14 01:15:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:42,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:42,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902919070] [2023-02-14 01:15:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:42,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:42,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:42,118 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) [2023-02-14 01:15:42,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 01:15:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 01:15:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:42,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:15:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:42,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:42,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800150232] [2023-02-14 01:15:42,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:15:42,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902919070] [2023-02-14 01:15:42,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902919070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:15:42,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:15:42,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-14 01:15:42,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185449272] [2023-02-14 01:15:42,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:15:42,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 01:15:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:42,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 01:15:42,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 01:15:42,204 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:42,260 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2023-02-14 01:15:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 01:15:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-14 01:15:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:42,262 INFO L225 Difference]: With dead ends: 95 [2023-02-14 01:15:42,262 INFO L226 Difference]: Without dead ends: 85 [2023-02-14 01:15:42,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-14 01:15:42,263 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:42,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 120 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:15:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-14 01:15:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2023-02-14 01:15:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 01:15:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2023-02-14 01:15:42,273 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 19 [2023-02-14 01:15:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:42,273 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2023-02-14 01:15:42,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2023-02-14 01:15:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 01:15:42,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:42,274 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:42,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:42,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:42,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2023-02-14 01:15:42,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:42,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715093354] [2023-02-14 01:15:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:42,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:42,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:42,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515125028] [2023-02-14 01:15:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:42,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:42,490 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) [2023-02-14 01:15:42,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 01:15:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:42,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-14 01:15:42,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:42,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:15:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:43,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715093354] [2023-02-14 01:15:43,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:15:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515125028] [2023-02-14 01:15:43,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515125028] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:15:43,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:15:43,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-02-14 01:15:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328157388] [2023-02-14 01:15:43,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:15:43,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 01:15:43,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 01:15:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-02-14 01:15:43,641 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:45,110 INFO L93 Difference]: Finished difference Result 119 states and 156 transitions. [2023-02-14 01:15:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 01:15:45,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-14 01:15:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:45,113 INFO L225 Difference]: With dead ends: 119 [2023-02-14 01:15:45,113 INFO L226 Difference]: Without dead ends: 113 [2023-02-14 01:15:45,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-02-14 01:15:45,114 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 124 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:45,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 89 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-14 01:15:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-14 01:15:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2023-02-14 01:15:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 56 states have internal predecessors, (72), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 01:15:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2023-02-14 01:15:45,126 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2023-02-14 01:15:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:45,127 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2023-02-14 01:15:45,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2023-02-14 01:15:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 01:15:45,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:45,128 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:45,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:45,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:45,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:45,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2023-02-14 01:15:45,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:45,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035303525] [2023-02-14 01:15:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:45,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:45,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:45,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181583028] [2023-02-14 01:15:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:45,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:45,357 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) [2023-02-14 01:15:45,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 01:15:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 01:15:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 01:15:45,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:15:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:45,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035303525] [2023-02-14 01:15:45,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:15:45,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181583028] [2023-02-14 01:15:45,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181583028] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:15:45,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:15:45,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 01:15:45,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118048107] [2023-02-14 01:15:45,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:15:45,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 01:15:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 01:15:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-14 01:15:45,435 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:45,538 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2023-02-14 01:15:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 01:15:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-14 01:15:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:45,541 INFO L225 Difference]: With dead ends: 108 [2023-02-14 01:15:45,541 INFO L226 Difference]: Without dead ends: 96 [2023-02-14 01:15:45,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-14 01:15:45,543 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:45,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:15:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-14 01:15:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2023-02-14 01:15:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 73 states have internal predecessors, (95), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 01:15:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2023-02-14 01:15:45,573 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 21 [2023-02-14 01:15:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:45,574 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2023-02-14 01:15:45,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2023-02-14 01:15:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 01:15:45,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:45,574 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:45,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:45,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:45,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:45,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1954557947, now seen corresponding path program 1 times [2023-02-14 01:15:45,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:45,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811901670] [2023-02-14 01:15:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:45,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:45,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:45,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517168230] [2023-02-14 01:15:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:45,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:45,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:45,791 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) [2023-02-14 01:15:45,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 01:15:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 01:15:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 01:15:45,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:15:45,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:45,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811901670] [2023-02-14 01:15:45,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:15:45,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517168230] [2023-02-14 01:15:45,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517168230] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:15:45,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:15:45,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 01:15:45,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692076148] [2023-02-14 01:15:45,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:15:45,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 01:15:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 01:15:45,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 01:15:45,893 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 01:15:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:46,172 INFO L93 Difference]: Finished difference Result 217 states and 293 transitions. [2023-02-14 01:15:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 01:15:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2023-02-14 01:15:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:46,174 INFO L225 Difference]: With dead ends: 217 [2023-02-14 01:15:46,174 INFO L226 Difference]: Without dead ends: 162 [2023-02-14 01:15:46,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:15:46,174 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 18 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:46,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 170 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:15:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-14 01:15:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2023-02-14 01:15:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 103 states have internal predecessors, (135), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-14 01:15:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 167 transitions. [2023-02-14 01:15:46,209 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 167 transitions. Word has length 32 [2023-02-14 01:15:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:46,209 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 167 transitions. [2023-02-14 01:15:46,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 01:15:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 167 transitions. [2023-02-14 01:15:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 01:15:46,211 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:46,211 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:46,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:46,416 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,SelfDestructingSolverStorable7 [2023-02-14 01:15:46,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash 346264643, now seen corresponding path program 1 times [2023-02-14 01:15:46,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233848209] [2023-02-14 01:15:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:46,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:46,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930935671] [2023-02-14 01:15:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:46,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:46,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:46,425 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) [2023-02-14 01:15:46,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 01:15:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:15:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 01:15:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:15:46,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:15:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 01:15:46,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:46,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233848209] [2023-02-14 01:15:46,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:15:46,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930935671] [2023-02-14 01:15:46,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930935671] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 01:15:46,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 01:15:46,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-02-14 01:15:46,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764160029] [2023-02-14 01:15:46,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:15:46,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:15:46,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:46,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:15:46,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 01:15:46,644 INFO L87 Difference]: Start difference. First operand 126 states and 167 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:46,790 INFO L93 Difference]: Finished difference Result 133 states and 173 transitions. [2023-02-14 01:15:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 01:15:46,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-02-14 01:15:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:46,792 INFO L225 Difference]: With dead ends: 133 [2023-02-14 01:15:46,792 INFO L226 Difference]: Without dead ends: 113 [2023-02-14 01:15:46,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-14 01:15:46,792 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:46,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 89 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:15:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-14 01:15:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2023-02-14 01:15:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 77 states have internal predecessors, (98), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 01:15:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2023-02-14 01:15:46,806 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 32 [2023-02-14 01:15:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:46,807 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2023-02-14 01:15:46,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:15:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2023-02-14 01:15:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 01:15:46,808 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:46,808 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:46,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:47,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:47,013 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash 136508765, now seen corresponding path program 2 times [2023-02-14 01:15:47,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:47,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9773958] [2023-02-14 01:15:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:47,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:47,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284726671] [2023-02-14 01:15:47,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:15:47,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:47,029 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) [2023-02-14 01:15:47,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 01:15:47,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:15:47,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:15:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 01:15:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:15:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:15:47,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:15:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 01:15:47,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:15:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9773958] [2023-02-14 01:15:47,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:15:47,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284726671] [2023-02-14 01:15:47,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284726671] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:15:47,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:15:47,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-14 01:15:47,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299138528] [2023-02-14 01:15:47,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:15:47,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 01:15:47,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:15:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 01:15:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-14 01:15:47,219 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 01:15:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:15:47,361 INFO L93 Difference]: Finished difference Result 239 states and 325 transitions. [2023-02-14 01:15:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 01:15:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 46 [2023-02-14 01:15:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:15:47,363 INFO L225 Difference]: With dead ends: 239 [2023-02-14 01:15:47,363 INFO L226 Difference]: Without dead ends: 231 [2023-02-14 01:15:47,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-14 01:15:47,364 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 112 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:15:47,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 189 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:15:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-02-14 01:15:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2023-02-14 01:15:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 190 states have (on average 1.2736842105263158) internal successors, (242), 191 states have internal predecessors, (242), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-14 01:15:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 299 transitions. [2023-02-14 01:15:47,401 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 299 transitions. Word has length 46 [2023-02-14 01:15:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:15:47,401 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 299 transitions. [2023-02-14 01:15:47,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 01:15:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 299 transitions. [2023-02-14 01:15:47,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-14 01:15:47,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:15:47,407 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:15:47,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 01:15:47,612 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,SelfDestructingSolverStorable9 [2023-02-14 01:15:47,613 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:15:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:15:47,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1689445411, now seen corresponding path program 3 times [2023-02-14 01:15:47,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:15:47,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970931814] [2023-02-14 01:15:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:15:47,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:15:47,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:15:47,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299870500] [2023-02-14 01:15:47,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:15:47,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:15:47,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:15:47,633 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) [2023-02-14 01:15:47,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process